CN108106855A - A kind of engine test constant volume flow helium injected system - Google Patents
A kind of engine test constant volume flow helium injected system Download PDFInfo
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- CN108106855A CN108106855A CN201810060168.XA CN201810060168A CN108106855A CN 108106855 A CN108106855 A CN 108106855A CN 201810060168 A CN201810060168 A CN 201810060168A CN 108106855 A CN108106855 A CN 108106855A
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- flow
- helium
- constant volume
- engine test
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/02—Details or accessories of testing apparatus
Abstract
The present invention relates to engine propellant feed system fields, and in particular to a kind of engine test constant volume flow helium injected system.Including etc. flow resistances scene calibrated in situ flow measurement device and along helium flow direction be successively set in helium outlet pipe etc. flow resistances flowmeter replacement device, power interface U-shaped compensation pipe and steady gas equalizing distributor；Etc. flow resistances scene calibrated in situ flow measurement device include mass flowmenter, for calibrating helium gas flow in the original location；Etc. flow resistances flowmeter replacement device for after calibration, replace mass flowmenter and flow resistance simultaneously adjusted according to the characteristic of mass flowmenter；Power interface U-shaped compensation pipe is U-tube section, for carrying out the compensation of power boundary and reducing the variation of flow behavior；Steady gas equalizing distributor includes at least two sections of supply air lines in parallel, and pressure fluctuation restraining device is equipped at least two sections of supply air lines.Solve the cavitation in turbopump brought due to helium gas flow can not be controlled accurately during distribution and pulsation interference problem.
Description
Technical field
The present invention relates to engine propellant feed system fields, and in particular to a kind of engine test constant volume flow helium
Gas injected system.
Background technology
In Test System for Rocket Engine Test, due to the high speed rotation of turbine pump in system, cause in Propellant Supply pipeline
There are more serious pulsation interference.
It is learnt by experiment, in order to reduce this pulsation interference, injecting a small amount of helium has significantly this pulsation
Inhibitory action.But helium gas flow can not accurately be controlled in existing engine propellant feed system, in distribution
Cheng Zhong, if the helium of injection is excessive, there will be the risks of cavitation erosion for turbine pump；If the helium of injection is very few, helium can not achieve
To the inhibitory action of pulsation.
The content of the invention
In order to solve the cavitation in turbopump brought due to helium gas flow can not be controlled accurately during distribution and pulsation interference
Problem, the present invention provides a kind of engine test constant volume flow helium injected system, it can be achieved that helium gas injection rate it is accurate
Control, gas injection fast response time, and from the influence of pump front tube pressure change.
The present invention technical solution be a kind of engine test constant volume flow helium injected system, it is special it
Be in：Including etc. flow resistances scene calibrated in situ flow measurement device and along helium flow direction be successively set in helium outlet pipe
Etc. flow resistances flowmeter replacement device, power interface U-shaped compensation pipe and steady gas equalizing distributor；
The flow resistances scene calibrated in situ flow measurement device such as above-mentioned includes mass flowmenter, for calibrating helium stream in the original location
Amount；
The flow resistances flowmeter replacement device such as above-mentioned is used to after calibration, replace mass flowmenter and according to mass flowmenter
Characteristic adjusts flow resistance；
Above-mentioned power interface U-shaped compensation pipe is U-tube section, for carrying out the compensation of power boundary and reducing the change of flow behavior
Change；
Above-mentioned steady gas equalizing distributor includes at least two sections of supply air lines in parallel, at least two sections of supply air lines
It is equipped with pressure fluctuation restraining device.
Further, the flow resistances flowmeter replacement device such as above-mentioned includes pipeline section, and throttle orifice is equipped in above-mentioned pipeline section.
Further, above-mentioned steady gas equalizing distributor includes four sections of different supply air lines of length in parallel.
Further, it is equipped with flow resistance regulating orifice plate in four sections of different supply air lines of length in parallel.
Further, pressure fluctuation restraining device is the one-way isolation inlet duct being arranged on four sections of pipelines, the list
To isolation inlet duct liquid oxygen and kerosene is prevented to pass through.
Further, above-mentioned power interface U-shaped compensation pipe is made of hard tube.
Further, above-mentioned one-way isolation inlet duct is check valve.
The beneficial effects of the invention are as follows：
1st, constant volume flow gas injected system of the present invention is on the base of common live calibrated in situ, use of innovation etc.
Flow resistance calibrated in situ method, by the flow resistance to existing pipeline and mass flowmenter in the case where using gas flow, by
Throttle orifice is set to carry out flow resistance adjusting in the smaller pipeline of flow resistance, realize live calibrated in situ etc. flow resistances replacement.Fully protect
The uniformity of check system and real system has been demonstrate,proved, has realized high-precision gas flow injection；It ensure that local flow characteristic；
The amount of injection helium is reached and desired value obtains the target that error is not higher than 3%；
2nd, constant volume flow gas injected system of the present invention includes U-shaped compensation pipe, is made as U-shaped structure using hard tube, i.e.,
The compensation requirement of power interface is met, since inside is smooth structure, the variation of flow behavior, solves when reducing vibration
The pulsation phenomenon of gas injection gas under vibration；
3rd, the steady gas equalizing distributor in constant volume flow gas injected system of the present invention include four sections of pipeline sections and
The one-way isolation inlet duct being arranged on four sections of pipeline sections ensures that the medium in liquid oxygen and Kerosene propellant system does not enter note
In gas system；And helium is enabled to uniformly enter into liquid oxygen and Kerosene propellant system；It is effectively reduced gas
Abnormal pressure during injection increases, and ensures to rise less than 30% in helium injection initial period pressure, start when having ensured gas injection
The normal work of machine.
Description of the drawings
Fig. 1 is present system schematic diagram；
Fig. 2 a are the actual effect figure inhibited using present system gas injection to propellant (kerosene) pulsation
Fig. 2 b are the actual effect figure inhibited using present system gas injection to propellant (liquid oxygen) pulsation；
Reference numeral is in figure：The flow resistances flowmeters such as the flow resistances such as 21- scene calibrated in situ flow measurement device, 22- substitute
Device, 23- power interfaces U compensation pipes, the steady gas equalizing distributor of flow resistance of 24- unsymmetric structures；25- flow resistances are adjusted
Orifice plate, 26- pressure fluctuation restraining devices.
Specific embodiment
Below in conjunction with drawings and the specific embodiments, the present invention will be further described.
It will be seen from figure 1 that the present embodiment system the flow resistances scene calibrated in situ flow measurement device 21 such as includes and along helium
Air-flow to set gradually etc. flow resistances flowmeter replacement device 22, power interface U compensation pipes 23, the flow resistance of unsymmetric structure puts down
Steady gas equalizing distributor 24.
Generally by use quality flow meter calibrating helium gas flow in the original location, it is measurable go out actual helium gas flow.Due to
The vibration environment of test bay, conventional method is to substitute mass flowmenter using straight tube after calibration, due to the change of local flow resistance
Change can cause not being inconsistent when actual flow and calibration, therefore the present invention using etc. flow resistances flowmeter replacement device (etc. flow resistances stream
Amount substitutes pipe) conventional straight tube is replaced, it ensure that local flow characteristic.The amount for having reached injection helium obtains error not with desired value
Target higher than 3%.
The device is on the basis of common live calibrated in situ, the flow resistances such as use of innovation scene in-situ calibration system,
By measuring the flow resistance of existing pipeline and mass flowmenter in the case where using gas flow, set in the smaller pipeline of flow resistance
Etc. flow resistances flow substitute pipe (pipeline in set throttle orifice) and carry out flow resistance adjusting, realize live calibrated in situ etc. flow resistances generation
It changes.It has fully ensured that the uniformity of check system and real system, has realized high-precision gas flow injection.
The setting of power interface U compensation pipes is mainly due to when test bay pipeline enters engine, due to thrust measurement
Demand, hose is generally set to carry out the compensation of power boundary on the interface of power.When helium injects, due to high-precision
Injection rate requirement, the ripple struction of hose can bend and beat in vibration, cause the fluctuation of gas injection gas, influence to inject
The stability of gas devises U compensation pipes, U-shaped structure is made as using hard tube therefore, that is, the compensation for meeting power interface will
It asks, since inside is smooth structure, the variation of flow behavior when reducing vibration solves the pulsation of gas injection gas under vibration
Phenomenon.
The steady gas equalizing distributor 24 of unsymmetric structure includes four sections of asymmetric (length is different) confessions in parallel
Air pipe, the flow resistance regulating orifice plate 25 and pressure fluctuation restraining device 26 being arranged on supply air line, pressure fluctuation restraining device
26 is are arranged on the one-way isolation inlet duct on four sections of pipelines, when liquid phase pressure is higher liquid phase are prevented to enter gas phase pipeline,
Avoid gas phase be pressurized after liquid phase flow backwards caused by pressure fluctuation.
The steady gas equilibrium assignment system of unsymmetric structure can ensure that medium in liquid oxygen and kerosene system cannot be into
Enter in gas injection system, the use of this device solves the problems, such as following two related to gas injection：
A, since the idle of spatial position can not realize being uniformly distributed for 4 pipelines in the setting of pipeline during gas injection.When
Pressure in pipeline after progress medium filling due to medium exists, and liquid state can enter gas injecting pipe, and due to pipeline rout
Difference, the liquid in each pipeline will be different, and when gas injection carries out, the liquid of each several part can be flow backwards, and gas is caused to enter
The time of gas injection apparatus is different, and non-uniform gas enters, and may cause the abnormal work of engine.
B, after entering gas path pipe due to liquid, when gas injection occurs, the flow resistance of liquid sharply increases, according to experiment
Data reach static 2 times, and by the use of this structure, abnormal pressure when being effectively reduced gas injection increases, protects
The normal work of engine when having hindered gas injection.
Actual effect such as Fig. 2 a and Fig. 2 b that engine gas injection inhibits propellant pulsation, demonstrate by injecting appropriate amount
Helium, the pulsation of Propellant Supply can be reduced to former pulsation 20%.
Claims (7)
1. a kind of engine test constant volume flow helium injected system, it is characterised in that：Including etc. flow resistances scene calibrated in situ
Flow measurement device and along helium flow direction be successively set in helium outlet pipe etc. flow resistances flowmeter replacement device, power demarcate
Face U-shaped compensation pipe and steady gas equalizing distributor；
The flow resistances scene calibrated in situ flow measurement device such as described includes mass flowmenter, for calibrating helium gas flow in the original location；
The flow resistances flowmeter replacement device such as described is used to after calibration, replace mass flowmenter and according to the characteristic of mass flowmenter
Adjust flow resistance；
The power interface U-shaped compensation pipe is U-tube section, for carrying out the compensation of power boundary and reducing the variation of flow behavior；
The steady gas equalizing distributor includes at least two sections of supply air lines in parallel, is all provided at least two sections of supply air lines
There is pressure fluctuation restraining device.
2. a kind of engine test constant volume flow helium injected system according to claim 1, it is characterised in that：It is described
Etc. flow resistances flowmeter replacement device include pipeline section, throttle orifice is equipped in the pipeline section.
3. a kind of engine test constant volume flow helium injected system according to claim 2, it is characterised in that：It is described
Steady gas equalizing distributor includes four sections of different supply air lines of length in parallel.
4. a kind of engine test constant volume flow helium injected system according to claim 3, it is characterised in that：It is in parallel
The different four sections of supply air lines of length in be equipped with flow resistance regulating orifice plate.
5. a kind of engine test constant volume flow helium injected system according to claim 4, it is characterised in that：Pressure
Restraining device of pulsing is the one-way isolation inlet duct being arranged on four sections of pipelines, and the one-way isolation inlet duct prevents liquid oxygen
And kerosene passes through.
6. according to a kind of any engine test constant volume flow helium injected systems of claim 1-5, feature exists
In：The power interface U-shaped compensation pipe is made of hard tube.
7. a kind of engine test constant volume flow helium injected system according to claim 6, it is characterised in that：It is described
One-way isolation inlet duct is check valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810060168.XA CN108106855B (en) | 2018-01-22 | 2018-01-22 | Engine test constant volume flow helium injection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810060168.XA CN108106855B (en) | 2018-01-22 | 2018-01-22 | Engine test constant volume flow helium injection system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108106855A true CN108106855A (en) | 2018-06-01 |
| CN108106855B CN108106855B (en) | 2023-07-25 |
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| CN201810060168.XA Active CN108106855B (en) | 2018-01-22 | 2018-01-22 | Engine test constant volume flow helium injection system |
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| JP2010107113A (en) * | 2008-10-30 | 2010-05-13 | Sanki Eng Co Ltd | Spiral heat exchanger and engine performance testing device |
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| US20170254536A1 (en) * | 2012-09-15 | 2017-09-07 | Honeywell International Inc. | System and approach for controlling a combustion chamber |
| DE102014000901A1 (en) * | 2013-01-29 | 2014-07-31 | Ritter XL Solar GmbH | Solar system has distribution conduit and manifold that are dimensioned such that heat carrier flow rate in collector field units decreases with increasing distance from heat absorber to collector array unit |
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| CN108106855B (en) | 2023-07-25 |
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