CN112946016B - Method and device for automatically debugging ablation test state of upper stationary point of electric arc heating equipment - Google Patents
Method and device for automatically debugging ablation test state of upper stationary point of electric arc heating equipment Download PDFInfo
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Abstract
The invention relates to an automatic debugging method, a device and a computer-readable storage medium for a stagnation point ablation test state on arc heating equipment, wherein the method comprises the following steps: setting an operation control parameter range of the electric arc heating equipment and a model state parameter range required by a test; setting initial operation control parameters of the electric arc heating equipment, and controlling the electric arc heating equipment to operate; measuring model state parameters in a stagnation point ablation test; judging whether the model state parameters in the stagnation point ablation test obtained by measurement meet the model state parameter range required by the test, if so, sending the pressure probe into the flow field to measure the flow field stagnation point pressure, and controlling the electric arc heating equipment to stop running; otherwise, judging whether the running time of the electric arc heating equipment exceeds a preset value, if so, controlling the electric arc heating equipment to stop running, and otherwise, executing corresponding running control parameter adjustment operation according to the measured model state parameters in the stagnation point ablation test and the model state parameter range required by the test.
Description
Technical Field
The invention is suitable for the field of test state debugging of an arc heating equipment upper stagnation point ablation test, and particularly relates to an automatic debugging method and device of an arc heating equipment upper stagnation point ablation test state and a computer readable storage medium.
Background
The arc heater upper stagnation point ablation test is one of important tests of an aircraft ground test and is used for ablation examination of structural materials such as aircrafts. The stagnation point ablation test adopts a free jet stagnation point ablation test technology, and the basic principle is as follows: high-temperature and high-pressure airflow generated by the electric arc heater is sprayed into the air through the supersonic velocity spray pipe, the model is placed on the axis of the spray pipe in a manner of being vertical to the airflow, the distance between the head of the model and the nozzle is about 5-10 mm, and the model is subjected to ablation examination by utilizing high-temperature and high-speed gas flowing in.
It is common in the art to adjust the arc heating apparatus to obtain the desired test condition parameters based on operator experience. After equipment runs, parameter measurement and equipment stops running each time, the test state parameters can be obtained by carrying out data processing, and then whether the requirements of the test state parameters are met or not is manually judged; and if the state parameters do not meet the range requirements of the state parameters, adjusting the running parameters of the equipment, and carrying out the next debugging test. Generally, the equipment is required to run for 4-8 times when one test state is debugged, the running interval of the equipment is long every time, and the debugging test efficiency is low. If the simulation error of the state parameters of the debugging test is reduced, the running times of the equipment are increased. Meanwhile, the simulation precision of the state parameters of the debugging test is influenced by personnel and progress, and the simulation precision is different. The debugging test state equipment is operated for one time, the water, electricity and gas cost labor cost of equipment operation is increased, and in addition, the equipment loss is high, and the debugging test cost is high.
Disclosure of Invention
The present invention is directed to solve one or more of the above-mentioned drawbacks of the prior art, and provides a method, an apparatus, and a computer-readable storage medium for automatically debugging an ablation test status of a stationary point on an arc heating device, which can implement automatic debugging of the ablation test status of the stationary point on the arc heating device.
In order to solve the technical problem, a first aspect of the present invention provides an automatic debugging method for a stagnation point ablation test state on an arc heating device, including the following steps:
setting an operation control parameter range of electric arc heating equipment and a model state parameter range required by a test;
setting initial operation control parameters of the electric arc heating equipment, and controlling the electric arc heating equipment to operate;
measuring model state parameters in a stagnation point ablation test;
judging whether the measured model state parameters in the stagnation point ablation test meet the model state parameter range required by the test:
if so, sending the pressure probe into the flow field to measure the standing point pressure of the flow field, and controlling the electric arc heating equipment to stop running;
otherwise, judging whether the running time of the arc heating equipment exceeds a preset value, if so, controlling the arc heating equipment to stop running, otherwise, executing corresponding running control parameter adjustment operation according to the measured model state parameters in the stagnation point ablation test and the model state parameter range required by the test, measuring the model state parameters again until the model state parameter range required by the test is met, and then measuring the flow field stagnation point pressure, or stopping running after the preset value of the running time of the arc heating equipment is reached.
In the automatic debugging method for the on-arc heating equipment stagnation point ablation test state, preferably, the operation control parameters comprise gas flow and control current; the model state parameters include the enthalpy of the airflow, the stagnation heat flow of the model, and the stagnation pressure of the model.
In the method for automatically debugging the state of the stagnation point ablation test on the arc heating equipment, preferably, the step of executing the corresponding operation control parameter adjustment operation according to the measured model state parameter in the stagnation point ablation test and the model state parameter range required by the test includes:
detecting that the enthalpy value of the airflow in the flow field is larger than the enthalpy value range of the airflow required by the test, and the stagnation point heat flow is larger than the stagnation point heat flow range required by the test, and executing first operation control parameter adjustment operation;
detecting that the enthalpy value of the airflow in the flow field is larger than the enthalpy value range of the airflow required by the test, and the stagnation point heat flow is smaller than the stagnation point heat flow range required by the test, and executing second operation control parameter adjustment operation;
detecting that the air flow enthalpy value of the flow field is within the air flow enthalpy value range required by the test, and the stagnation point heat flow is larger than the stagnation point heat flow range required by the test, and executing third operation control parameter adjustment operation;
detecting that the air flow enthalpy value of the flow field is within the air flow enthalpy value range required by the test, and the stagnation point heat flow is smaller than the stagnation point heat flow range required by the test, and executing fourth operation control parameter adjustment operation;
detecting that the enthalpy value of the airflow of the flow field is smaller than the enthalpy value range of the airflow required by the test, and the stagnation point heat flow is larger than the stagnation point heat flow range required by the test, and executing a fifth operation control parameter adjustment operation;
detecting that the enthalpy value of the airflow in the flow field is smaller than the enthalpy value range of the airflow required by the test, and the stagnation point heat flow is smaller than the stagnation point heat flow range required by the test, and executing sixth operation control parameter adjustment operation;
detecting that the enthalpy value of the airflow in the flow field is larger than the enthalpy value range of the airflow required by the test, and the stagnation point heat flow is located in the stagnation point heat flow range required by the test, and executing seventh operation control parameter adjustment operation;
and (3) if the enthalpy value of the airflow in the detection flow field is smaller than the enthalpy value range of the airflow required by the test and the stagnation point heat flow is within the stagnation point heat flow range required by the test, executing eighth operation control parameter adjustment operation.
In the automatic debugging method for the ablation test state of the stagnation point on the arc heating equipment, preferably, the first operation control parameter adjusting operation comprises the following steps:
when the detected control current does not reach the minimum control current, reducing the control current;
when the detected control current reaches the minimum control current, the control current is not reduced any more, and the judgment of the air flow enthalpy value meeting the requirement of the air flow enthalpy value parameter range is carried out
And calculating the control current required by the test according to the enthalpy value of the air flow required by the test and the actual enthalpy value of the air flow.
In the automatic debugging method for the ablation test state of the stagnation point on the arc heating equipment, preferably, the second operation control parameter adjusting operation comprises the following steps:
when the detected gas flow does not reach the maximum gas flow, increasing the gas flow;
when the detected gas flow reaches the maximum gas flow, the gas flow is not increased any more, and the judgment of the gas flow enthalpy value meets the requirement of the gas flow enthalpy value parameter range;
and calculating the gas flow required by the test according to the enthalpy value of the gas flow required by the test and the actual enthalpy value of the gas flow.
In the automatic debugging method for the ablation test state of the stagnation point on the arc heating equipment, preferably, the third operation control parameter adjusting operation comprises the following steps:
when the detected gas flow and the control current do not reach the minimum, reducing the gas flow and reducing the control current;
when the detected gas flow reaches the minimum gas flow and the control current does not reach the minimum control current, the gas flow is not reduced, the judgment of the gas flow enthalpy value meets the parameter range requirement of the gas flow enthalpy value, and only the control current is reduced;
when the detected gas flow does not reach the minimum gas flow and the equipment control current reaches the minimum control current, the control current is not reduced, the judgment of the enthalpy value of the gas flow meets the parameter range requirement of the enthalpy value of the gas flow, and only the gas flow is reduced;
when the detected gas flow and the control current reach minimum simultaneously, the enthalpy value of the air flow and the heat flow at the stagnation point are judged to meet the requirement of the parameter range.
In the method for automatically debugging the state of the stagnation point ablation test on the arc heating equipment, preferably, the fourth operation control parameter adjusting operation comprises the following steps:
when the detected gas flow and the control current do not reach the maximum, increasing the gas flow and increasing the control current;
when the detected gas flow reaches the maximum gas flow and the control current does not reach the maximum control current, the gas flow is not increased, the judgment of the gas flow enthalpy value meets the parameter range requirement of the gas flow enthalpy value, and only the control current is increased;
when the detected gas flow does not reach the maximum gas flow and the equipment control current reaches the maximum control current, the control current is not increased, the judgment that the enthalpy value of the gas flow meets the set parameter range of the enthalpy value of the gas flow is carried out, and only the gas flow is increased;
when the detected gas flow and the control current reach the maximum simultaneously, the enthalpy value of the air flow and the heat flow at the stagnation point are judged to meet the requirement of the parameter range.
In the automatic debugging method for the ablation test state of the stagnation point on the arc heating equipment, preferably, the fifth operation control parameter adjusting operation comprises the following steps:
when the detected gas flow does not reach the minimum gas flow, reducing the gas flow;
when the detected gas flow reaches the minimum gas flow, the gas flow is not reduced, and the enthalpy value of the gas flow is judged to meet the parameter range requirement of the enthalpy value of the gas flow.
In the automatic debugging method for the ablation test state of the stagnation point on the arc heating equipment, preferably, the sixth operation control parameter adjusting operation comprises the following steps:
when the detected control current does not reach the maximum control current, increasing the control current;
and detecting that the control current reaches the maximum control current, and judging that the enthalpy value of the air flow meets the parameter range requirement of the enthalpy value of the air flow without increasing the control current.
In the automatic debugging method for the ablation test state of the stagnation point on the arc heating equipment, preferably, the seventh operation control parameter adjusting operation comprises the following steps:
when the control current does not reach the minimum control current and the gas flow does not reach the maximum gas flow, reducing the control current and increasing the gas flow;
and detecting that the control current reaches the minimum control current or the gas flow reaches the maximum gas flow, and judging that the enthalpy value of the gas flow and the heat flow at the stagnation point both meet the requirement of a parameter range.
In the automatic debugging method for the ablation test state of the stagnation point on the arc heating equipment, preferably, the eighth operation control parameter adjusting operation comprises the following steps:
when the control current does not reach the maximum control current and the gas flow does not reach the minimum gas flow, the control current is increased and the gas flow is reduced;
and detecting that the control current reaches the maximum control current or the gas flow reaches the minimum gas flow, and judging that the enthalpy value of the gas flow and the stagnation point heat flow both meet the requirement of a parameter range.
In a second aspect of the present invention, an automatic debugging apparatus for a stationary point ablation test state on an arc heating device is provided, which includes: at least one processor, at least one memory and a computer program stored in the memory, characterized in that the computer program realizes the method as described before when the computer program is executed by the processor.
In a third aspect of the invention, a computer-readable storage medium is provided, on which a computer program is stored, which when executed by a processor implements the method as described above.
The automatic debugging method, the device and the computer readable storage medium for the ablation test state of the upper stagnation point of the electric arc heating equipment have the following beneficial effects that: the invention improves the test state debugging method of the arc heating equipment upper stagnation point ablation test, changes manual multiple debugging tests into automatic single debugging tests, automatically adjusts the running parameters of the equipment, continuously performs parameter measurement and data processing in real time, automatically judges whether the requirements of the test state parameters are met, can debug the required test state parameters through one test, improves the debugging test efficiency, improves the debugging test simulation precision and reduces the debugging test cost.
Drawings
FIG. 1 is a flow chart of a method for automatically debugging the state of a stagnation ablation test on an arc heating device according to a preferred embodiment of the invention;
FIG. 2 is a flow chart of an operation control parameter adjustment operation according to a preferred embodiment of the present invention;
FIG. 3 is a flow chart of a first operational control parameter adjustment operation according to a preferred embodiment of the present invention;
FIG. 4 is a flow chart of a second operation control parameter adjustment operation in accordance with the preferred embodiment of the present invention;
FIG. 5 is a flowchart of a third run control parameter adjustment operation in accordance with a preferred embodiment of the present invention;
FIG. 6 is a flowchart of a fourth operation control parameter adjustment operation in accordance with the preferred embodiment of the present invention;
FIG. 7 is a flowchart of a fifth run control parameter adjustment operation in accordance with a preferred embodiment of the present invention;
FIG. 8 is a flowchart of a sixth operational control parameter adjustment operation in accordance with a preferred embodiment of the present invention;
FIG. 9 is a flowchart of a seventh run control parameter adjustment operation in accordance with a preferred embodiment of the present invention;
fig. 10 is a flowchart of an eighth operation control parameter adjustment operation according to a preferred embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Fig. 1 is a flowchart of an automatic debugging method for the ablation test status of the stagnation point on the arc heating equipment according to the preferred embodiment of the invention. As shown in fig. 1, the method for automatically debugging the state of the stagnation point ablation test on the arc heating equipment provided by this embodiment includes the following steps:
s101, starting a process; the stagnation point ablation test of the method is realized by adopting a free jet stagnation point ablation test technology, and the basic principle is as follows: high-temperature and high-pressure airflow generated by electric arc heating equipment is sprayed into the air through a supersonic velocity spray pipe, a model is placed on the axis of the spray pipe in a manner of being vertical to the airflow, the distance between the head of the model and a nozzle is about 5-10 mm, and the model is ablated and examined by utilizing high-temperature and high-speed gas flowing in.
S102, setting the operation control parameter range of the arc heating equipment. In which operation is carried outThe control parameters include gas flow and control current of the arc heating apparatus. The operation control parameters also include an operating time of the arc heating apparatus. Therefore, the maximum control current I can be set in this step according to the capacity of the arc heating device max Minimum control current I min Maximum gas flow rate G max Minimum gas flow rate G min And the maximum run time of the device.
S103, setting a model state parameter range required by the test; wherein the model state parameters include the enthalpy value H of the air flow 0 The stagnation heat flow q of the model, etc.
S104, setting initial operation control parameters of the arc heating equipment; calculating equipment operation control parameters such as gas flow, control current and the like of the electric arc heating equipment according to a formula, and determining and setting initial equipment operation control parameters by combining similar equipment operation parameter data in the past; such as gas flow 800g and control current 1500A.
S105, controlling the operation of the arc heating equipment; controlling the ignition operation of the arc heating equipment according to the initial operation control parameters, and establishing a high-temperature flow field;
s106, starting parameter measurement; and after the flow field is stable, the heat flow probe is sent to the center of the flow field and stays for a long time, and the heat flow at the stagnation point of the flow field is measured.
S107, acquiring and processing the model state parameters through a collector, and measuring the model state parameters to obtain model state parameters in a stagnation point ablation test; preferably, signals of the heat flow sensor, the gas flow sensor, the arc chamber pressure sensor and the like are acquired by the data acquisition unit through the amplifier filter and are processed in real time to obtain the enthalpy value H of the airflow 0 And state parameters such as stagnation heat flow q.
S108, judging whether the measured model state parameters in the stagnation point ablation test meet the model state parameter range required by the test: if yes, go to step S111, otherwise go to step S109; specifically, the enthalpy value H of the airflow of the flow field obtained by the treatment is processed in software in the step 0 And comparing the stagnation point heat flow q of the model with the set air flow enthalpy value and the parameter range requirement of the stagnation point heat flow to judge whether the stagnation point heat flow q meets the requirement.
S109, judging whether the running time of the arc heating equipment exceeds a preset value, if so, turning to a step S112, otherwise, turning to a step S110; in this step, it is determined whether the operation time of the arc heating apparatus exceeds the maximum operation time of the apparatus set in step S102, and if yes, it means that the operation time exceeds the preset value.
S110, executing corresponding operation control parameter adjustment operation according to the measured model state parameters in the stagnation point ablation test and the model state parameter range required by the test, and measuring the model state parameters again in the step S106 until the model state parameter range required by the test is met or the preset value of the operation time of the arc heating equipment is reached. If the model state parameters do not meet the parameter range requirement and the equipment operation time does not exceed the preset value, adjusting equipment operation control parameters such as gas flow, control current and the like in real time, returning to the step S106, and measuring the parameters in real time again without stopping the equipment operation;
s111, sending the pressure probe into a flow field to measure the pressure of a flow field stationary point and storing pressure data; namely, when the air flow enthalpy value of the flow field and the heat flow of the model stagnation point meet the requirement of the state parameter range, measuring the stagnation point pressure;
s112, controlling the arc heating equipment to stop running; when the pressure measurement of the stagnation point is finished or the running time of the equipment exceeds a preset value, the electric arc heating equipment stops running, and the debugging test of the test state is finished;
and S113, ending the flow.
Referring to fig. 2, a flow chart of an operation control parameter adjustment operation according to a preferred embodiment of the invention is shown. As shown in fig. 2, the executing, in step S110, a corresponding operation control parameter adjustment operation according to the measured model state parameter in the stagnation point ablation test and the model state parameter range required by the test may specifically include executing the following detections in sequence after the start of the process:
1) Detecting flow field enthalpy value H 0 If the enthalpy value of the air flow is larger than the range of the enthalpy value required by the test and the stagnation point heat flow q is larger than the range of the stagnation point heat flow required by the test, executing a first operation control parameter adjustment operation, namely executing a subprogram 1;
2) Detecting flow field enthalpy value H 0 If the enthalpy value of the air flow is larger than the enthalpy value range required by the test and the stagnation point heat flow q is smaller than the stagnation point heat flow range required by the test, executing a second operation control parameter adjustment operation, namely executing a subprogram 2;
3) Detecting flow field enthalpy value H 0 If the enthalpy value of the airflow is within the range of the enthalpy value required by the test and the stagnation point heat flow q is larger than the range of the stagnation point heat flow required by the test, executing a third operation control parameter adjustment operation, namely executing a subprogram 3;
4) Detecting flow field enthalpy value H 0 If the enthalpy value of the air flow is within the range of the enthalpy value required by the test and the stagnation point heat flow q is smaller than the range of the stagnation point heat flow required by the test, executing a fourth operation control parameter adjustment operation, namely executing a subprogram 4;
5) Detecting flow field enthalpy value H 0 If the enthalpy value of the air flow is smaller than the enthalpy value range required by the test and the stagnation point heat flow q is larger than the stagnation point heat flow range required by the test, executing a fifth operation control parameter adjustment operation, namely executing a subprogram 5;
6) Detecting flow field enthalpy value H 0 If the enthalpy value of the air flow is smaller than the enthalpy value range required by the test and the stagnation point heat flow q is smaller than the stagnation point heat flow range required by the test, executing a sixth operation control parameter adjustment operation, namely executing a subprogram 6;
7) Detecting flow field enthalpy value H 0 If the enthalpy value of the air flow is larger than the enthalpy value range required by the test and the stagnation point heat flow q is positioned in the stagnation point heat flow range required by the test, executing a seventh operation control parameter adjustment operation, namely executing a subprogram 7;
8) Detecting flow field enthalpy value H 0 And if the enthalpy value of the air flow is smaller than the range of the enthalpy value of the air flow required by the test and the stagnation point heat flow q is within the range of the stagnation point heat flow required by the test, executing an eighth operation control parameter adjustment operation, namely executing the subprogram 8.
Referring to fig. 3, a flowchart of a first operation control parameter adjustment operation according to a preferred embodiment of the invention is shown. When enthalpy value H of airflow 0 And when the enthalpy of the air flow is larger than the parameter range requirement of the enthalpy of the air flow and the stagnation point heat flow q is larger than the parameter range requirement of the stagnation point heat flow, executing a sub-program 1. As shown in fig. 3, the first operation control parameter adjustment operation includes the following steps:
1) Detecting that the control current has not reached the minimum control current I min When the current is higher than the set value, the control current is reduced;
2) Detecting that the control current reaches the minimum control current I min And when the enthalpy value of the air flow meets the parameter range requirement of the enthalpy value of the air flow, the control current is not reduced any more.
In the first operation control parameter adjustment operation, the control current required by the test is calculated according to the air flow enthalpy value and the actual air flow enthalpy value required by the test, namely the adjusted control current, and the control current can be specifically calculated by the following formula:
wherein, I' is the control current required by the test, and G is the gas flow obtained by measurement; i is control current before adjustment, namely arc current of the arc heating equipment; h 0REF The enthalpy of the air flow required for the test; p is 0 For measuring the resulting arc chamber pressure of the arc heating apparatus, A * Is the effective area of the sonic cross-section of the nozzle.
In order to calculate the control current I' required by the test, the enthalpy value of the air flow which is debugged by the formula (1), namely the actual enthalpy value of the air flow, can be calculated by the formula (2) to calculate the efficiency of the equipment, and the enthalpy value of the air flow required by the test is calculated by substituting the formula (3), so that the formula is obtained.
H o ＝5.1×10 -3 (P o A * /G) 2.519 (1)
In the formula:
H 0 -enthalpy of the air stream, MJ/kg.
P 0 -measuring the resulting arc chamber pressure, MPa, of the arc heating apparatus.
A * Effective area of sonic cross-section of the nozzle, cm 2 ；
G is gas flow, kg/s;
in the formula:
η — electric arc heating equipment operating efficiency, i.e. equipment efficiency,%;
u-arc voltage, V;
i-arc current, i.e. control current, a.
Referring to fig. 4, a flowchart of a second operation control parameter adjustment operation according to a preferred embodiment of the invention is shown. When enthalpy value H of air flow 0 And if the enthalpy of the air flow is larger than the enthalpy parameter range requirement of the air flow and the stagnation heat flow q is smaller than the stagnation heat flow parameter range requirement, executing the sub-program 2. As shown in fig. 4, the second operation control parameter adjustment operation includes the following steps:
1) Detecting that the gas flow does not reach the maximum gas flow G max While, increasing the gas flow;
2) Detecting that the gas flow reaches the maximum gas flow G max And when the enthalpy value of the air flow meets the parameter range requirement of the enthalpy value of the air flow, the air flow is not increased any more.
And calculating the gas flow required by the test according to the enthalpy value of the gas flow required by the test and the actual enthalpy value of the gas flow in the second operation control parameter adjusting operation. Preferably, it is calculated in particular by the following formula:
wherein G' is the gas flow required by the test, and G is the gas flow obtained by measurement; h 0REF The enthalpy of the air flow required for the test; p is a radical of 0 For measuring the resulting arc chamber pressure of the arc heating apparatus, A * Is the effective area of the sonic cross section of the nozzle.
In order to calculate the gas flow required by the test, the enthalpy value of the air flow which is debugged by the formula (1), namely the actual enthalpy value of the air flow, can be calculated by the formula (2) to calculate the efficiency of the equipment, and the enthalpy value of the air flow required by the test is calculated by substituting the formula (4), so that the formula is obtained.
Referring to fig. 5, a flowchart of a third operation control parameter adjustment operation according to a preferred embodiment of the invention is shown. When enthalpy value H of airflow 0 And when the requirement of the air flow enthalpy value parameter range is met and the stagnation point heat flow q is larger than the requirement of the stagnation point heat flow parameter range, executing a subprogram 3. As shown in fig. 5, the third operation control parameter adjustment operation includes the following steps:
1) When the detected gas flow and the control current do not reach the minimum, reducing the gas flow and reducing the control current;
2) Detecting the gas flow to the minimum gas flow G min And the control current does not reach the minimum control current I min When the enthalpy value of the air flow is judged to meet the parameter range requirement of the enthalpy value of the air flow, the control current is only reduced;
3) Detecting gas flow not reaching minimum gas flow G min And the equipment control current reaches the minimum control current I min When the enthalpy value of the air flow meets the parameter range requirement of the enthalpy value of the air flow, the control current is not reduced any more, and only the air flow is reduced;
4) When the detected gas flow and the control current reach minimum simultaneously, the enthalpy value of the air flow and the heat flow at the stagnation point are judged to meet the requirement of the parameter range.
The calculation method of the gas flow required by the test, namely the new gas flow after adjustment, comprises the following steps: the stagnation point pressure P required by the test is obtained by the formula (5) s Lambda is calculated from the expressions (6) and (7), and the arc chamber pressure P required for the test is calculated from the expressions (8) and (9) 0REF Calculating a new gas flow G' by the formula (10); the new calculation method of the control current comprises the following steps: calculated by the method of subroutine 1.
P s ＝6.55R eff [q/(H 0REF -0.93)] 2 (5)
In the formula:
P s -the stagnation pressure required for the test, MPa;
R eff -effective radius of the stagnation heat flow model, m;
stagnation Heat flow, MW/m, of the q-stagnation Heat flow model 2 ；
H 0REF The enthalpy of the air flow required for the test;
q(λ)＝A * /A (6)
in the formula:
q (λ) - -a function with respect to λ;
λ -velocity coefficient;
a-effective area of the cross-section of the nozzle outlet, m 2 。
In the formula:
gamma- -specific heat ratio of gas.
In the formula:
sigma-total pressure ratio.
P 0REF ＝P s /σ (9)
In the formula:
P 0REF the arc chamber pressure of the arc heating apparatus required for the test, MPa.
Referring to FIG. 6, a flowchart of a fourth operation control parameter adjustment operation according to a preferred embodiment of the present invention is shown. When enthalpy value H of airflow 0 And when the requirement of the parameter range of the enthalpy value of the airflow is met and the stagnation point heat flow q is smaller than the requirement of the parameter range of the stagnation point heat flow, executing a sub-program 4. As shown in figure 6 of the drawings,the fourth operation control parameter adjustment operation includes the steps of:
1) When the detected gas flow and the control current do not reach the maximum, increasing the gas flow and increasing the control current;
2) Detecting that the gas flow reaches the maximum gas flow G max And the control current does not reach the maximum control current I max When the enthalpy value of the air flow meets the parameter range requirement of the enthalpy value of the air flow, only the control current is increased;
3) Detecting that the gas flow does not reach the maximum gas flow G max And the device control current reaches the maximum control current I max When the enthalpy value of the air flow meets the set enthalpy value parameter range of the air flow, only the air flow is increased;
4) When the detected gas flow and the control current reach the maximum simultaneously, the enthalpy value of the air flow and the heat flow at the stagnation point are judged to meet the requirement of the parameter range.
The new gas flow and control current are calculated by the method of subroutine 3.
Referring to fig. 7, a flowchart of a fifth operation control parameter adjustment operation according to a preferred embodiment of the invention is shown. When enthalpy value H of airflow 0 And when the enthalpy value of the air flow is smaller than the parameter range requirement of the enthalpy value of the air flow and the stagnation point heat flow q is larger than the parameter range requirement of the stagnation point heat flow, executing a subprogram 5. As shown in fig. 7, the fifth operation control parameter adjustment operation includes the steps of:
1) Detecting gas flow not reaching minimum gas flow G min When the gas flow is reduced;
2) Detecting the gas flow to the minimum gas flow G min And in the process, the air flow is not reduced any more, and the judgment that the air flow enthalpy value meets the requirement of the air flow enthalpy value parameter range is carried out.
The new gas flow rate is calculated from the above equation (4).
Referring to fig. 8, a flowchart of a sixth operation control parameter adjustment operation according to the preferred embodiment of the invention is shown. When enthalpy value H of airflow 0 And when the enthalpy value of the air flow is smaller than the parameter range requirement, and the stagnation point heat flow q is smaller than the parameter range requirement of the stagnation point heat flow, executing a sub-program 6.As shown in fig. 8, the sixth operation control parameter adjustment operation includes the steps of:
1) Detecting that the control current does not reach the maximum control current I max When the current is increased, the control current is increased;
2) Detecting that the control current reaches the maximum control current I max The enthalpy value of the air flow is judged to meet the parameter range requirement of the enthalpy value of the air flow without increasing the control current;
the new control current calculation method comprises the following steps: calculated by the method of subroutine 1.
Referring to fig. 9, a flowchart of a seventh operation control parameter adjustment operation according to a preferred embodiment of the invention is shown. When enthalpy value H of airflow 0 And if the enthalpy value of the air flow is larger than the range requirement of the enthalpy value parameter of the air flow and the stagnation point heat flow q meets the range requirement of the stagnation point heat flow parameter, executing a sub-program 7. As shown in fig. 9, the seventh operation control parameter adjustment operation includes the steps of:
1) Detecting that the control current has not reached the minimum control current I min While the gas flow does not reach the maximum gas flow G max When the gas flow rate is increased, the control current is decreased;
2) Detecting that the control current reaches the minimum control current I min Or the gas flow reaches the maximum gas flow G max Judging that the enthalpy value and the stagnation point heat flow of the air flow meet the requirement of a parameter range;
the new gas flow and control current are calculated by the method of subroutine 3.
Referring to fig. 10, a flowchart of an eighth operation control parameter adjustment operation according to a preferred embodiment of the invention is shown. When enthalpy value H of airflow 0 And when the enthalpy value of the air flow is smaller than the parameter range requirement of the enthalpy value of the air flow and the stagnation point heat flow q meets the parameter range requirement of the stagnation point heat flow, executing a sub-program 8. As shown in fig. 10, the eighth operation control parameter adjustment operation includes the steps of:
1) Detecting that the control current has not reached the maximum control current I max While the gas flow does not reach the minimum gas flow G min When the gas flow is increased, the control current is increased and the gas flow is reduced;
2) Detecting that the control current reaches the maximum control current I max Or the gas flow reaches the minimum gas flow G min And judging that the enthalpy value and the stagnation point heat flow of the air flow meet the requirement of the parameter range.
The new gas flow and control current are calculated by the method of subroutine 3.
The embodiment of the invention also provides a device for executing the automatic debugging method of the ablation test state of the stagnation point on the electric arc heating equipment, which comprises the following steps: at least one processor, at least one memory and a computer program stored in the memory, which when executed by the processor, implement the method for automatically debugging the state of a stagnation ablation test on an arc heating apparatus as in the above embodiments.
An embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the method for automatically debugging the ablation test state of the stagnation point on the arc heating apparatus in the above embodiment is implemented.
The principle of the method is that firstly, the operation range of the equipment and the operation parameters of the preset equipment are set, after the ignition operation flow field of the equipment is established to be stable, the enthalpy value of model airflow and the heat flow of model stagnation point are measured, the state parameters such as the enthalpy value of the model airflow and the heat flow of the model stagnation point are obtained through real-time processing, and the state parameters are compared with the requirement of the state parameter range; and when the state parameters do not meet the range requirement of the state parameters, adjusting the gas flow and the control current in real time, simultaneously, continuously measuring and processing data in real time to obtain the state parameters such as the enthalpy value of the flow field airflow, the heat flow of the model stagnation point and the like, comparing the state parameters with the range requirement of the state parameters until the debugged state parameters meet the range requirement of the state parameters, measuring the stagnation point pressure, then controlling the equipment to stop running, and ending the debugging test of the test state. According to the invention, the operation control parameters of the equipment are adjusted in real time, the state parameters such as the enthalpy value of the air flow, the heat flow at the stagnation point and the like are obtained through real-time measurement, acquisition and processing, and are compared with the required parameter range, so that the test state of the stagnation point ablation test on the electric arc heating equipment can be automatically debugged, the required test state parameters can be debugged through one test, the debugging test efficiency can be greatly improved, the simulation precision of the debugging test is improved, and the debugging test cost is reduced.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (5)
1. An automatic debugging method for the ablation test state of a stagnation point on arc heating equipment is characterized by comprising the following steps:
setting an operation control parameter range of the electric arc heating equipment and a model state parameter range required by a test;
setting initial operation control parameters of the electric arc heating equipment, and controlling the electric arc heating equipment to operate;
measuring model state parameters in a stagnation point ablation test;
judging whether the measured model state parameters in the stagnation point ablation test meet the model state parameter range required by the test:
if so, sending the pressure probe into the flow field to measure the standing point pressure of the flow field, and controlling the electric arc heating equipment to stop running;
otherwise, judging whether the running time of the arc heating equipment exceeds a preset value, if so, controlling the arc heating equipment to stop running, otherwise, executing corresponding running control parameter adjustment operation according to the measured model state parameters in the stagnation point ablation test and the model state parameter range required by the test, measuring the model state parameters again until the model state parameter range required by the test is met, and then measuring the flow field stagnation point pressure, or stopping running after the preset value of the running time of the arc heating equipment is reached;
wherein: the operation control parameters comprise gas flow and control current;
the model state parameters comprise an air flow enthalpy value, a stagnation point heat flow of the model and a stagnation point pressure of the model;
the operation of executing corresponding operation control parameter adjustment operation according to the model state parameter in the measured stagnation point ablation test and the model state parameter range required by the test comprises the following steps:
detecting that the enthalpy value of the airflow in the flow field is larger than the enthalpy value range of the airflow required by the test, and the stagnation point heat flow is larger than the stagnation point heat flow range required by the test, and executing first operation control parameter adjustment operation;
detecting that the enthalpy value of the airflow in the flow field is larger than the enthalpy value range of the airflow required by the test, and the stagnation point heat flow is smaller than the stagnation point heat flow range required by the test, and executing second operation control parameter adjustment operation;
detecting that the air flow enthalpy value of the flow field is within the air flow enthalpy value range required by the test, and the stagnation point heat flow is larger than the stagnation point heat flow range required by the test, and executing third operation control parameter adjustment operation;
detecting whether the enthalpy value of the airflow of the flow field is within the enthalpy value range of the airflow required by the test, and if the stagnation point heat flow is smaller than the stagnation point heat flow range required by the test, executing fourth operation control parameter adjustment operation;
detecting that the enthalpy value of the airflow in the flow field is smaller than the enthalpy value range of the airflow required by the test, and the stagnation point heat flow is larger than the stagnation point heat flow range required by the test, and executing a fifth operation control parameter adjustment operation;
detecting that the enthalpy value of the airflow in the flow field is smaller than the enthalpy value range of the airflow required by the test, and the stagnation point heat flow is smaller than the stagnation point heat flow range required by the test, and executing sixth operation control parameter adjustment operation;
detecting that the enthalpy value of the airflow in the flow field is larger than the enthalpy value range of the airflow required by the test, and the stagnation point heat flow is located in the stagnation point heat flow range required by the test, and executing seventh operation control parameter adjustment operation;
detecting that the enthalpy value of the airflow in the flow field is smaller than the enthalpy value range of the airflow required by the test, and executing eighth operation control parameter adjustment operation if the stagnation point heat flow is located in the stagnation point heat flow range required by the test;
the first operation control parameter adjustment operation includes the steps of:
when the detected control current does not reach the minimum control current, reducing the control current;
when the detected control current reaches the minimum control current, the control current is not reduced any more, and the enthalpy value of the air flow is judged to meet the parameter range requirement of the enthalpy value of the air flow
Calculating control current required by the test according to the enthalpy value of the air flow required by the test and the actual enthalpy value of the air flow;
the second operation control parameter adjustment operation includes the steps of:
when the detected gas flow does not reach the maximum gas flow, increasing the gas flow;
when the detected gas flow reaches the maximum gas flow, the gas flow is not increased any more, and the judgment of the gas flow enthalpy value meets the requirement of the gas flow enthalpy value parameter range;
the method comprises the following steps of calculating the gas flow required by a test according to the air flow enthalpy value required by the test and an actual air flow enthalpy value;
the third operation control parameter adjustment operation includes the steps of:
when the detected gas flow and the control current do not reach the minimum, reducing the gas flow and reducing the control current;
when the detected gas flow reaches the minimum gas flow and the control current does not reach the minimum control current, the gas flow is not reduced, the judgment of the gas flow enthalpy value meets the parameter range requirement of the gas flow enthalpy value, and only the control current is reduced;
when the detected gas flow does not reach the minimum gas flow and the equipment control current reaches the minimum control current, the control current is not reduced, the judgment of the enthalpy value of the gas flow meets the parameter range requirement of the enthalpy value of the gas flow, and only the gas flow is reduced;
when the detected gas flow and the control current reach minimum simultaneously, the enthalpy value of the air flow and the heat flow at the stagnation point are judged to meet the requirement of the parameter range;
the fourth operation control parameter adjustment operation includes the steps of:
when the detected gas flow and the control current do not reach the maximum, increasing the gas flow and increasing the control current;
when the detected gas flow reaches the maximum gas flow and the control current does not reach the maximum control current, the gas flow is not increased, the judgment of the gas flow enthalpy value meets the parameter range requirement of the gas flow enthalpy value, and only the control current is increased;
when the detected gas flow does not reach the maximum gas flow and the equipment control current reaches the maximum control current, the control current is not increased, the judgment that the enthalpy value of the gas flow meets the set parameter range of the enthalpy value of the gas flow is carried out, and only the gas flow is increased;
when the detected gas flow and the control current reach the maximum simultaneously, the enthalpy value of the air flow and the stagnation point heat flow are judged to meet the requirement of a parameter range;
the fifth operation control parameter adjustment operation includes the steps of:
when the detected gas flow does not reach the minimum gas flow, reducing the gas flow;
when the detected gas flow reaches the minimum gas flow, the gas flow is not reduced, and the judgment of the gas flow enthalpy value meets the requirement of the gas flow enthalpy value parameter range;
the sixth operation control parameter adjustment operation includes the steps of:
when the detected control current does not reach the maximum control current, increasing the control current;
detecting that the control current reaches the maximum control current, and judging that the enthalpy value of the air flow meets the parameter range requirement of the enthalpy value of the air flow without increasing the control current;
the seventh operation control parameter adjustment operation includes the steps of:
when the control current does not reach the minimum control current and the gas flow does not reach the maximum gas flow, reducing the control current and increasing the gas flow;
detecting that the control current reaches the minimum control current or the gas flow reaches the maximum gas flow, and judging that the enthalpy value of the gas flow and the heat flow at the stagnation point both meet the requirement of a parameter range;
the eighth operation control parameter adjustment operation includes the steps of:
when the control current does not reach the maximum control current and the gas flow does not reach the minimum gas flow, the control current is increased and the gas flow is reduced;
and detecting that the control current reaches the maximum control current or the gas flow reaches the minimum gas flow, and judging that the enthalpy value of the gas flow and the stagnation point heat flow both meet the requirement of a parameter range.
2. The automatic debugging method for the ablation test state of the stagnation points on the arc heating equipment as claimed in claim 1, wherein the step of calculating the control current required by the test according to the air flow enthalpy value required by the test and the actual air flow enthalpy value comprises the following steps of:
wherein, I' is the control current required by the test, and G is the gas flow obtained by measurement; i is the control current before adjustment; h 0REF The enthalpy of the air flow required for the test; p is a radical of 0 For measuring the resulting arc chamber pressure of the arc heating apparatus, A * Is the effective area of the sonic cross section of the nozzle.
3. The automatic debugging method for the ablation test state of the stagnation point on the arc heating equipment as claimed in claim 1, characterized in that:
the method is characterized in that the gas flow required by the test is calculated according to the air flow enthalpy value required by the test and the actual air flow enthalpy value, and comprises the following steps of:
wherein G' is the gas flow required by the test, and G is the gas flow obtained by measurement; h 0REF The enthalpy of the air flow required for the test; p is a radical of 0 For measuring the resulting arc chamber pressure of the arc heating apparatus, A * Is the effective area of the sonic cross-section of the nozzle.
4. An automatic debugging device for the stay point ablation test state on arc heating equipment comprises: at least one processor, at least one memory and a computer program stored in the memory, characterized in that the computer program realizes the method according to any one of claims 1 to 3 when executed by the processor.
5. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the method according to any one of claims 1 to 3.
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