CN103970943A - Design method of Z-type flow cold plate of active phased array antenna based on layout of devices - Google Patents
Design method of Z-type flow cold plate of active phased array antenna based on layout of devices Download PDFInfo
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Abstract
The invention discloses a design method of a Z-type flow cold plate of an active phased array antenna based on layout of devices. The method comprises the first step of determining the positions of all the heating devices, the second step of determining the longitudinal flow position and the transverse flow position of a Z-type flow, the third step of determining a geometric model of the Z-type flow of a T/R assembly, the fourth step of calculating the temperature distribution and pressure drop of a linear array, and the fifth step of judging whether the Z-type flow cold plate meets a thermal design index of the antenna or not. According to the design method of the Z-type flow cold plate, whether the Z-type flow cold plate meets the thermal design requirement or not is judged by calculating the temperature distribution of the array. Compared with a traditional Z-type flow, the Z-type flow designed according to the method has the advantages that the better heat dissipation capability is achieved, the highest temperature of the heating devices is lower, the pressure drop of the cold plate is reduced effectively, the thermal design index of the antenna can be met, the pump power can also be reduced remarkably, and the working capability of an antenna platform is enhanced. According to the method, corresponding Z-type flows can be designed for the distribution of the different heating devices so as to meet the requirement for the temperature of the active phased array antenna, and the method has the actual engineering significance.
Description
Technical field
The present invention relates to antenna technical field, particularly a kind of method for designing of the Z-type runner cold drawing towards active phase array antenna.
Background technology
Active Phased Array Radar is because element height is concentrated, and working temperature is very high, so thermal design is one of key issue of phased-array radar design always.T/R assembly is the core of active phase array antenna, the heater members such as power amplifier, low noise amplifier, attenuator are comprised, and on antenna array, be thick with the huge T/R assembly of quantity, and the thermal value producing is very large, and under working environment, antenna array heat flow density sharply rises.In addition, the high power amplifier in T/R assembly is to responsive to temperature, and high-temperature working environment is serious to high power amplifier performance impact, thereby Phased Array Radars is produced to very large impact.The feature of the thermal force wide ranges that liquid cold plate has is simple in structure, cooling effectiveness is high, the optional kind of fluid is many, cooling, can play good effect for the cooling of high heat flux phased-array radar T/R assembly.Therefore, cold drawing has obtained application more widely in phased-array radar, and cold drawing heat radiation becomes comparatively efficient, stable heat dissipating method at present.
Z-type runner can be used as a kind of form of cold drawing runner, and can reach certain radiating effect.Traditional Z-type runner is made up of longitudinal runner and transverse flow channels, the outlet of transverse flow channels connecting passage and entrance, and the transverse flow channels in exit and the transverse flow channels of porch are interconnected by longitudinal runner.But easily there is in actual applications the problem that the heater members temperature difference is larger in traditional Z type runner, cause high power amplifier part can not reach good radiating effect, can have a huge impact the radiating effect of cold drawing entirety.
Therefore, be necessary the thermal design index request according to active phase array antenna, Z-type runner cold drawing is designed to the radiating effect that reaches optimum.Determining behind the position of each heater members in T/R assembly, design Z-type runner correspondingly according to device position, thereby make the maximum temperature of antenna linear array and pressure drop reach thermal design index request.
Summary of the invention
The object of the present invention is to provide the active phase array antenna Z-type runner cold drawing method for designing based on device layout, the method is by determining the position of each heater members in T/R assembly, design Z-type runner correspondingly, thereby make active phase array antenna cold drawing radiating effect reach its thermal design index request.
The present invention realizes by following technical proposals:
An active phase array antenna Z-type runner cold drawing method for designing based on device layout, the method comprises the following steps:
1), according to the layout of each heater members in T/R assembly, determine the position coordinates of each heater members;
2) by the position coordinates of each heater members, and then longitudinal runner position of definite T/R assembly Z-type runner and the entrance transverse flow channels position of Z-type runner and outlet transverse flow channels position;
3) by longitudinal runner position of T/R assembly Z-type runner and the entrance transverse flow channels position of Z-type runner and outlet transverse flow channels position, determine T/R assembly Z-type runner geometric model;
4) according to T/R assembly Z-type runner geometric model, set up the finite element model of active phase array antenna linear array, and calculate Temperature Distribution and the pressure drop of active phase array antenna linear array;
5), according to the index request of antenna thermal design, judge whether Temperature Distribution and the pressure drop of calculating active phase array antenna linear array meet the index request of active phase array antenna thermal design, if met the demands, active phase array antenna thermal design meets the requirements; Otherwise, amendment array antenna Z-type runner geometric cross section parameter, and repeating step 3) and to step 4), until meet the demands.
Further, described step 1) in T/R assembly comprise heater members high power amplifier, driving amplifier, low noise amplifier and T/R package shell.
Further, described step 1) in the position coordinates of each heater members comprise x direction coordinate and the y direction coordinate of each heater members.
Further, described step 2) in determine that longitudinal runner position of T/R assembly Z-type runner and the entrance transverse flow channels position of Z-type runner and outlet transverse flow channels position carry out according to following steps:
2a) according to the x direction coordinate of each heater members, the x direction coordinate using the x direction coordinate of heater members as longitudinal runner of Z-type runner cold drawing, thus determine longitudinal runner position of Z-type runner cold drawing;
If two heater members distance is greater than 2 times of Z-type width of flow path, the x direction coordinate using the x direction coordinate of heater members as longitudinal runner of Z-type runner cold drawing;
If heater members distance is less than 2 times of Z-type width of flow path, and the heating power of two or two above heater members differs by more than 10 times, the above heater members of two or two share runners and are divided into one group, the x direction coordinate using the x direction coordinate of the larger heater members of heating power as longitudinal runner of Z-type runner cold drawing;
If more than two or two heater members distances is less than 2 times of Z-type width of flow path, and the heating power of heater members differs and is less than 10 times, more than two or two heater members shares runner and is divided into one group, adopts following formula to determine the x direction coordinate x ' of longitudinal runner of Z-type runner cold drawing:
In formula, Q
1, Q
2be respectively the heating power of two heater members, x
1for being divided into more than two or two coordinate of the heater members of x direction minimum in heater members of a group, x
2for being divided into more than two or two coordinate of the heater members of x direction maximum in heater members of a group, and the heater members that shares runner is divided into one group;
Thereby determine longitudinal runner position of Z-type runner, meanwhile, adopt following formula to determine longitudinal runner number N ' of Z-type runner:
N′＝N-M+L
In formula, N is heater members number, and M is the heater members number that shares a longitudinal runner, and L is the group number that shares the heater members of runner;
2b) according to the y direction coordinate of each heater members, determine that wherein minimum y direction coordinate is Z-type runner entrance transverse flow channels y direction coordinate, determine that wherein maximum y direction coordinate is Z-type runner exit transverse flow channels y direction coordinate, thereby determine entrance transverse flow channels position and the outlet transverse flow channels position of Z-type runner.
Further, described step 3) in determine T/R assembly Z-type runner geometric model carry out according to following steps:
3a), according to definite longitudinal runner position of T/R assembly Z-type runner and the entrance transverse flow channels position of Z-type runner and outlet transverse flow channels position, connect respectively longitudinal runner of Z-type runner and the entrance transverse flow channels position of Z-type runner and outlet transverse flow channels;
3b) longitudinal runner of coordinate augment direction N ' bar Z-type runner is distinguished the longitudinal runner 1 of called after, longitudinal longitudinal runner N ' of runner 2 in the x-direction;
3c) the entrance transverse flow channels that is parallel to Z-type runner in the y-direction coordinate augment direction do the entrance transverse flow channels of a N '-1 Z-type runner, coordinate augment direction is by the entrance transverse flow channels of N ' bar Z-type runner called after entrance transverse flow channels 1, entrance transverse flow channels 2 entrance transverse flow channels N ' respectively in the y-direction; And the outlet transverse flow channels that is parallel to Z-type runner in the y-direction coordinate reduce direction and do the outlet transverse flow channels of a N '-1 Z-type runner, by the transverse flow channels of N ' bar Z-type runner exit, called after outlet transverse flow channels 1, outlet transverse flow channels 2 export transverse flow channels N ' to coordinate augment direction respectively in the y-direction;
3d) connect successively the longitudinal runner of Z-type runner, Z-type runner entrance transverse flow channels and Z-type runner exit transverse flow channels, the runner that the outlet transverse flow channels of longitudinal runner of the Z-type runner that deletion name label is not identical, the entrance transverse flow channels of Z-type runner, Z-type runner is connected, obtains N ' bar Z-type runner;
3e) add fillet at the knuckle place, right angle of N ' bar Z-type runner, determine Z-type runner axis line track, and Z-type runner geometric cross section is stretched along Z-type runner axis line track, thereby determine T/R assembly Z-type runner geometric model.
Further, described step 4) in the finite element model of active phase array antenna linear array comprise Z-type runner cold drawing, T/R assembly, reinforcement and antenna element.
Further, described step 5) in the index request of active phase array antenna thermal design comprise that heater members limiting temperature, heater members limit the temperature difference and limit cold drawing pressure drop.
The present invention compared with prior art, has the following advantages:
1. the present invention proposes the active phase array antenna Z-type runner cold drawing method for designing based on device layout, by active phase array antenna linear array being carried out to modeling and calculating its front Temperature Distribution, and then judge whether Z-type runner cold drawing meets antenna thermal design requirement.This method provides a kind of heat sink conception of Z-type runner cold drawing to active phase array antenna that utilize efficiently, can effectively work ensureing under active phase array antenna in working order.
2. the Z-type runner that the method designs is compared with traditional Z-type runner, there is better heat-sinking capability, heater members maximum temperature is lower, and effectively reduce the pressure drop of cold drawing, can not only meet the thermal design index of active phase array antenna, also can obviously fall low pump work, thereby strengthen the supply capacity of antenna platform;
3. the method, than traditional Z-type runner, can distribute for different heat device, and it is designed to corresponding Z-type runner, to reach the temperature requirement of active phase array antenna, has actual construction value.
Brief description of the drawings
Fig. 1 is the design flow diagram of Z-type runner cold drawing of the present invention;
Fig. 2 is the T/R assembly heater members location drawing;
Fig. 3 is longitudinal runner location drawing of Z-type runner cold drawing;
Fig. 4 is Z-type runner tentative programme;
Fig. 5 is the further scheme of Z-type runner;
Fig. 6 is Z-type runner geometric model vertical view;
Fig. 7 is antenna linear array geometric model;
Fig. 8 is antenna linear array finite element model;
Fig. 9 is antenna linear array Temperature Distribution.
Embodiment
Below in conjunction with drawings and Examples, the present invention will be further described.
Shown in Fig. 1, the method for designing of a kind of Z-type runner cold drawing based on heater members position of the present invention, step is as follows:
Step 1, determines the position coordinates of each heater members
According to the layout of each heater members of T/R assembly, determine the position coordinates of each heater members.Wherein heater members comprises high power amplifier HPA, driving amplifier, low noise amplifier LNA1, low noise amplifier LNA2.T/R assembly comprises heater members and T/R package shell.High power amplifier HPA heating power is 15.5W, and driving amplifier heating power is 0.75W, and low noise amplifier LNA1 heating power is 0.2W, and low noise amplifier LNA2 heating power is 0.3W.
Step 2, determines longitudinally and transverse flow channels position
According to the position coordinates of each heater members, determine longitudinal runner position and the transverse flow channels position of T/R assembly Z-type runner.
Determine that longitudinal runner position and the transverse flow channels position of T/R assembly Z-type runner carry out according to following steps:
2a) according to the x direction coordinate of each heater members, the x direction coordinate using the x direction coordinate of heater members as longitudinal runner of Z-type runner cold drawing, thus determine longitudinal runner position of Z-type runner cold drawing;
If two heater members distance is greater than 2 times of Z-type width of flow path, the x direction coordinate using the x direction coordinate of heater members as longitudinal runner of Z-type runner cold drawing;
If heater members distance is less than 2 times of Z-type width of flow path, and the heating power of two or two above heater members differs by more than 10 times, the above heater members of two or two share runners and are divided into one group, the x direction coordinate using the x direction coordinate of the larger heater members of heating power as longitudinal runner of Z-type runner cold drawing;
If more than two or two heater members distances is less than 2 times of Z-type width of flow path, and the heating power of heater members differs and is less than 10 times, more than two or two heater members shares runner and is divided into one group, adopts following formula to determine the x direction coordinate x ' of longitudinal runner of Z-type runner cold drawing:
In formula, Q
1, Q
2be respectively the heating power of two heater members, x
1for being divided into more than two or two coordinate of the heater members of x direction minimum in heater members of a group, x
2for being divided into more than two or two coordinate of the heater members of x direction maximum in heater members of a group, and the heater members that shares runner is divided into one group;
Thereby determine longitudinal runner position of Z-type runner, meanwhile, adopt following formula to determine longitudinal runner number N ' of Z-type runner:
N′＝N-M+L
In formula, N is heater members number, and M is the heater members number that shares a longitudinal runner, and L is the group number that shares the heater members of runner;
2b) according to the y direction coordinate of each heater members, determine that wherein minimum y direction coordinate is Z-type runner entrance transverse flow channels y direction coordinate, determine that wherein maximum y direction coordinate is Z-type runner exit transverse flow channels y direction coordinate, thereby determine entrance transverse flow channels position and the outlet transverse flow channels position of Z-type runner.
Step 3, determine T/R assembly Z-type runner geometric model
According to position and the transverse flow channels position of longitudinal runner of T/R assembly Z-type runner cold drawing, determine Z-type runner design scheme;
3a), according to definite longitudinal runner position of T/R assembly Z-type runner and the entrance transverse flow channels position of Z-type runner and outlet transverse flow channels position, connect respectively longitudinal runner of Z-type runner and the entrance transverse flow channels position of Z-type runner and outlet transverse flow channels;
3b) longitudinal runner of coordinate augment direction N ' bar Z-type runner is distinguished the longitudinal runner 1 of called after, longitudinal longitudinal runner N ' of runner 2 in the x-direction;
3c) the entrance transverse flow channels that is parallel to Z-type runner in the y-direction coordinate augment direction do the entrance transverse flow channels of a N '-1 Z-type runner, coordinate augment direction is by the entrance transverse flow channels of N ' bar Z-type runner called after entrance transverse flow channels 1, entrance transverse flow channels 2 entrance transverse flow channels N ' respectively in the y-direction; And the outlet transverse flow channels that is parallel to Z-type runner in the y-direction coordinate reduce direction and do the outlet transverse flow channels of a N '-1 Z-type runner, by the transverse flow channels of N ' bar Z-type runner exit, called after outlet transverse flow channels 1, outlet transverse flow channels 2 export transverse flow channels N ' to coordinate augment direction respectively in the y-direction;
3d) connect successively the longitudinal runner of Z-type runner, Z-type runner entrance transverse flow channels and Z-type runner exit transverse flow channels, the runner that the outlet transverse flow channels of longitudinal runner of the Z-type runner that deletion name label is not identical, the entrance transverse flow channels of Z-type runner, Z-type runner is connected, obtains N ' bar Z-type runner;
3e) add fillet at the knuckle place, right angle of N ' bar Z-type runner, determine Z-type runner axis line track, and Z-type runner geometric cross section is stretched along Z-type runner axis line track, thereby determine T/R assembly Z-type runner geometric model.
Step 4, Temperature Distribution and the pressure drop of calculating antenna linear array
According to T/R assembly Z-type runner geometric model, set up the finite element model of active phase array antenna linear array, and calculate Temperature Distribution and the pressure drop of active phase array antenna linear array;
The present invention, according to T/R assembly Z-type runner design scheme, by definite Z-type runner geometric model, is connected the outlet of 4 Z-type runner geometric models successively with entrance in Solidworks, forms linear array Z-type runner geometric model; Set up the geometric model of T/R assembly, and the geometric model of 4 identical T/R assemblies and Z-type runner cold drawing, linear array Z-type runner, reinforcement and 4 antenna elements is assembled, set up the geometric model of active phase array antenna linear array, and in ICEM grid division, set up the finite element model of active phase array antenna linear array.Determine the each several part physical parameter of the finite element model of active phase array antenna linear array, the boundary condition of the finite element model of active phase array antenna linear array is set in CFX-Pre, and calculate the Temperature Distribution of active phase array antenna linear array, and extract high power amplifier maximum temperature, cold drawing pressure drop, the heater members temperature difference at CFX-Post.
What Solidworks was designed by Da Suo company has powerful function, and assembly is more, is a powerful 3D software.The drag function of Solidworks can complete complicated Assembly of the parts design within a short period of time.Collaborative by the operation that is much easy to learn and use and powerful design function.CFX software is a large-scale thermoanalytical commercial CFD software that is applied to.CFX software mainly comprises three part: ICEM (pre-processing module), CFX-Pre (analytical calculation module) and CFX-Post (post-processing module).ICEM provides a powerful instrument to carry out solid modelling and grid is divided; CFX-Pre can carry out model to carry out stable state, transient state and nonlinear analysis; CFX-Post can show result of calculation in the mode of figure, simultaneously can be by result of calculation with chart, curve form output display.
Step 5, judge whether to meet thermal design requirement
5), according to the index request of antenna thermal design, judge whether Temperature Distribution and the pressure drop of calculating active phase array antenna linear array meet the index request of active phase array antenna thermal design, if met the demands, active phase array antenna thermal design meets the requirements; Otherwise, amendment array antenna Z-type runner geometric cross section parameter, the width widen of the runner passing through by the too high device below of maximum temperature, and repeating step 3) and to step 4), until meet the demands.
The index request of active phase array antenna thermal design comprises the maximum temperature of heater members restriction, maximum temperature difference and the pressure drop of restriction cold drawing that heater members limits.
The present invention can further illustrate by emulation:
1. emulation active phase array antenna linear array parameter
For the heat-sinking capability of checking Z-type runner cold drawing, be applied to the active phase array antenna linear array of X-band 10GHz.The material of Z-type runner cold drawing and T/R shell is that the material of aluminium, heater members is that the material of gallium arsenide (GaAs), liquid coolant is water.
The physical parameter of table 1 aluminium, gallium arsenide, water
2. calculate Temperature Distribution and the pressure drop of antenna linear array
The Temperature Distribution of antenna linear array and pressure drop can obtain by following four steps:
(1) determine the position coordinates of each heater members
According to the layout of each heater members of T/R assembly, determine the position coordinates of each heater members.Wherein heater members comprises high power amplifier HPA, driving amplifier, low noise amplifier LNA1, low noise amplifier LNA2.T/R assembly comprises heater members and T/R package shell.High power amplifier HPA heating power is 15.5W, and driving amplifier heating power is 0.75W, and low noise amplifier LNA1 heating power is 0.2W, and low noise amplifier LNA2 heating power is 0.3W; Shown in each heater members location drawing 2 of T/R assembly.
(2) determine longitudinal and transverse flow channels position
According to the position coordinates of each heater members, determine longitudinal runner position and the transverse flow channels position of T/R assembly Z-type runner;
Determine that longitudinal runner position and the transverse flow channels position of T/R assembly Z-type runner carry out according to following steps:
2a) according to the x direction coordinate of each heater members, the x direction coordinate using the x direction coordinate of heater members as longitudinal runner of Z-type runner cold drawing, thus determine longitudinal runner position of Z-type runner cold drawing;
If two heater members distance is greater than 2 times of Z-type width of flow path, the x direction coordinate using the x direction coordinate of heater members as longitudinal runner of Z-type runner cold drawing;
If heater members distance is less than 2 times of Z-type width of flow path, and the heating power of two or two above heater members differs by more than 10 times, the above heater members of two or two share runners and are divided into one group, the x direction coordinate using the x direction coordinate of the larger heater members of heating power as longitudinal runner of Z-type runner cold drawing;
If more than two or two heater members distances is less than 2 times of Z-type width of flow path, and the heating power of heater members differs and is less than 10 times, more than two or two heater members shares runner and is divided into one group, adopts following formula to determine the x direction coordinate x ' of longitudinal runner of Z-type runner cold drawing:
In formula, Q
1, Q
2be respectively the heating power of two heater members, x
1for being divided into more than two or two coordinate of the heater members of x direction minimum in heater members of a group, x
2for being divided into more than two or two coordinate of the heater members of x direction maximum in heater members of a group, and the heater members that shares runner is divided into one group;
Thereby determine longitudinal runner position of Z-type runner, meanwhile, adopt following formula to determine longitudinal runner number N ' of Z-type runner:
N′＝N-M+L
In formula, N is heater members number, and N is that 16, M is the heater members number that shares a longitudinal runner, and M is that 14, L is the group number that shares the heater members of runner, and L is 5, and N ' is 7; 7 heating runners of the coordinate augment direction longitudinal runner 1 of called after, longitudinal longitudinal runner 7 of runner 2 respectively in the x-direction; Longitudinal runner location drawing of Z-type runner cold drawing as shown in Figure 3;
2b) according to the y direction coordinate of each heater members, determine that wherein minimum y direction coordinate is Z-type runner entrance transverse flow channels y direction coordinate, determine that wherein maximum y direction coordinate is Z-type runner exit transverse flow channels y direction coordinate, thereby determine entrance transverse flow channels position and the outlet transverse flow channels position of Z-type runner.
(3) determine Z-type runner geometric model
According to position and the transverse flow channels position of longitudinal runner of T/R assembly Z-type runner cold drawing, determine Z-type runner geometric model;
3a) according to definite longitudinal runner position of T/R assembly Z-type runner and the entrance transverse flow channels position of Z-type runner and outlet transverse flow channels position, connect respectively longitudinal runner of Z-type runner and the entrance transverse flow channels position of Z-type runner and outlet transverse flow channels, form Z-type runner tentative programme; Z-type runner tentative programme as shown in Figure 4;
3b) longitudinal runner of 7 Z-type runners of coordinate augment direction is distinguished the longitudinal runner 1 of called after, longitudinal longitudinal runner 7 of runner 2 in the x-direction;
3c) the entrance transverse flow channels that is parallel to Z-type runner in the y-direction coordinate augment direction do the entrance transverse flow channels of 6 Z-type runners, coordinate augment direction is by the entrance transverse flow channels of 7 Z-type runners called after entrance transverse flow channels 1, entrance transverse flow channels 2 entrance transverse flow channels 7 respectively in the y-direction; And the outlet transverse flow channels that is parallel to Z-type runner in the y-direction coordinate reduce direction and do the outlet transverse flow channels of 6 Z-type runners, by the transverse flow channels of 7 Z-type runner exits, called after outlet transverse flow channels 1, outlet transverse flow channels 2 export transverse flow channels 7 to coordinate augment direction respectively in the y-direction, thereby form the further scheme of Z-type runner, the further scheme of Z-type runner as shown in Figure 5;
3d) connect successively the longitudinal runner of Z-type runner, Z-type runner entrance transverse flow channels and Z-type runner exit transverse flow channels, the runner that the outlet transverse flow channels of longitudinal runner of the Z-type runner that deletion name label is not identical, the entrance transverse flow channels of Z-type runner, Z-type runner is connected, obtains 7 Z-type runners;
3e) add fillet at knuckle place, the right angle of 7 Z-type runners, determine Z-type runner axis line track, and Z-type runner geometric cross section is stretched along Z-type runner axis line track, thus determine T/R assembly Z-type runner geometric model, Z-type runner geometric model vertical view is as shown in Figure 6.
(4) Temperature Distribution and the pressure drop of calculating antenna linear array
According to T/R assembly Z-type runner design scheme, set up the finite element model of active phase array antenna linear array; And Temperature Distribution and the pressure drop of calculating active phase array antenna linear array;
The present invention, according to T/R assembly Z-type runner geometric model, is connected the outlet of 4 Z-type runner geometric models in Solidworks with entrance, set up linear array Z-type runner geometric model; Set up the geometric model of T/R assembly, and the geometric model of 4 identical T/R assemblies and Z-type runner geometric model, cold drawing, reinforcement and 4 antenna elements is assembled, set up the geometric model of active phase array antenna linear array, as shown in Figure 7, in figure, A is antenna element to antenna linear array geometric model, and B is Z-type runner, C is T/R assembly, D is Z-type runner cold drawing, and E is Z-type runner entrance, and F is Z-type runner exit; From left to right called after T/R assembly 1, T/R assembly 2, T/R assembly 3, T/R assembly 4 successively of T/R assembly.Because the heating power of high power amplifier in all heater members accounts for the more than 90% of the total heating power of T/R assembly, therefore device heating power of the present invention is mainly considered the heating power of high power amplifier, from left to right called after HPA1, HPA2, HPA3HPA15, HPA16 successively of the high power amplifier in T/R assembly.
Grid division in ICEM, sets up the finite element model of active phase array antenna linear array, and antenna linear array finite element model as shown in Figure 8.The finite element model of active phase array antenna linear array comprises the finite element model of Z-type runner cold drawing, T/R assembly, Z-type runner, reinforcement and antenna element.
Determine the each several part physical parameter of the finite element model of active phase array antenna linear array, Z-type runner cold drawing, T/R assembly, reinforcement material are aluminium, and Z-type runner liquid coolant is water, and antenna element material is gallium arsenide.The boundary condition of the finite element model of active phase array antenna linear array is set in CFX-Pre, and calculates the Temperature Distribution of active phase array antenna linear array, it is that static heat solves that emulation solves type; Model Fluid entry condition is speed edges, and entrance flow velocity is 1.5m/s; Fluid intake temperature is 273K (20 DEG C); Fluid egress point condition is relative static pressure; Convergence residual error is set to 10
-5; Iterations is set to 120 steps; The antenna linear array Temperature Distribution calculating as shown in Figure 9; Heater members maximum temperature, heater members maximum temperature difference, cold drawing pressure drop from CFX-Post.
3. simulation result
Utilize antenna linear array Temperature Distribution that above step obtains as shown in Figure 9.The high power amplifier maximum temperature of extracting from CFX-Post is as shown in table 1.
Table 1 device maximum temperature
As can be seen from Table 1, because the heat of active phase array antenna T/R assembly 90% is from the power amplifier of its inside, and power amplifier is comparatively responsive to temperature, its electrical property progressively worsens along with temperature raises, according to the requirement of antenna electric performance, must make the power amplifier maximum temperature of T/R assembly lower than 70 DEG C of License Values, to improve T/R gain, ensure its normal reliable and work; High power amplifier maximum temperatures all in table 1, all lower than 70 DEG C, meet the high power amplifier maximum temperature of thermal design index request.
As can be seen from Table 1, because the thermal design of active phase array antenna should meet the requirement of device maximum temperature difference, be that control device maximum temperature difference can not be excessive, thereby the object that the temperature difference that reaches whole antenna array can not be excessive, because front excessive temperature differentials not only can affect T/R assembly phase equalization, also can make antenna cold drawing and T/R package shell produce thermal deformation, these factors all can affect active phase array antenna electrical property, and the typical temperature coherence request temperature difference is 7 DEG C to the maximum; In table 2, the maximum temperature of HPA15 is up to 59.0 DEG C, and the maximum temperature of HPA1 is minimum is 52.5 DEG C, and the temperature difference is 6.5 DEG C, meets the device maximum temperature difference requirement of thermal design index request.
In addition, the cold drawing pressure drop of extracting in CFX-Post reaches 0.16MPa, is less than the 0.3MPa of index request, meets the cold drawing pressure drop of index thermal design requirement.
In sum, adopt device maximum temperature, device maximum temperature difference and the cold drawing pressure drop of the antenna linear array of Z-type runner cold drawing to meet active phase array antenna thermal design index request.
Claims (7)
1. the active phase array antenna Z-type runner cold drawing method for designing based on device layout, is characterized in that, the method comprises the following steps:
1), according to the layout of each heater members in T/R assembly, determine the position coordinates of each heater members;
2) by the position coordinates of each heater members, and then longitudinal runner position of definite T/R assembly Z-type runner and the entrance transverse flow channels position of Z-type runner and outlet transverse flow channels position;
3) by longitudinal runner position of T/R assembly Z-type runner and the entrance transverse flow channels position of Z-type runner and outlet transverse flow channels position, determine T/R assembly Z-type runner geometric model;
4) according to T/R assembly Z-type runner geometric model, set up the finite element model of active phase array antenna linear array, and calculate Temperature Distribution and the pressure drop of active phase array antenna linear array;
5), according to the index request of antenna thermal design, judge whether Temperature Distribution and the pressure drop of calculating active phase array antenna linear array meet the index request of active phase array antenna thermal design, if met the demands, active phase array antenna thermal design meets the requirements; Otherwise, amendment array antenna Z-type runner geometric cross section parameter, and repeating step 3) and to step 4), until meet the demands.
2. the active phase array antenna Z-type runner cold drawing method for designing based on device layout according to claim 1, it is characterized in that described step 1) in T/R assembly comprise heater members high power amplifier, driving amplifier, low noise amplifier and T/R package shell.
3. the active phase array antenna Z-type runner cold drawing method for designing based on device layout according to claim 1, is characterized in that described step 1) in the position coordinates of each heater members comprise x direction coordinate and the y direction coordinate of each heater members.
4. the active phase array antenna Z-type runner cold drawing method for designing based on device layout according to claim 3, it is characterized in that described step 2) in determine that longitudinal runner position of T/R assembly Z-type runner and the entrance transverse flow channels position of Z-type runner and outlet transverse flow channels position carry out according to following steps:
2a) according to the x direction coordinate of each heater members, the x direction coordinate using the x direction coordinate of heater members as longitudinal runner of Z-type runner cold drawing, thus determine longitudinal runner position of Z-type runner cold drawing;
If two heater members distance is greater than 2 times of Z-type width of flow path, the x direction coordinate using the x direction coordinate of heater members as longitudinal runner of Z-type runner cold drawing;
If heater members distance is less than 2 times of Z-type width of flow path, and the heating power of two or two above heater members differs by more than 10 times, the above heater members of two or two share runners and are divided into one group, the x direction coordinate using the x direction coordinate of the larger heater members of heating power as longitudinal runner of Z-type runner cold drawing;
If more than two or two heater members distances is less than 2 times of Z-type width of flow path, and the heating power of heater members differs and is less than 10 times, more than two or two heater members shares runner and is divided into one group, adopts following formula to determine the x direction coordinate x ' of longitudinal runner of Z-type runner cold drawing:
In formula, Q
1, Q
2be respectively the heating power of two heater members, x
1for being divided into more than two or two coordinate of the heater members of x direction minimum in heater members of a group, x
2for being divided into more than two or two coordinate of the heater members of x direction maximum in heater members of a group, and the heater members that shares runner is divided into one group;
Thereby determine longitudinal runner position of Z-type runner, meanwhile, adopt following formula to determine longitudinal runner number N ' of Z-type runner:
N′＝N-M+L
In formula, N is heater members number, and M is the heater members number that shares a longitudinal runner, and L is the group number that shares the heater members of runner;
2b) according to the y direction coordinate of each heater members, determine that wherein minimum y direction coordinate is Z-type runner entrance transverse flow channels y direction coordinate, determine that wherein maximum y direction coordinate is Z-type runner exit transverse flow channels y direction coordinate, thereby determine entrance transverse flow channels position and the outlet transverse flow channels position of Z-type runner.
5. the active phase array antenna Z-type runner cold drawing method for designing based on device layout according to claim 1, is characterized in that described step 3) in determine T/R assembly Z-type runner geometric model carry out according to following steps:
3a), according to definite longitudinal runner position of T/R assembly Z-type runner and the entrance transverse flow channels position of Z-type runner and outlet transverse flow channels position, connect respectively longitudinal runner of Z-type runner and the entrance transverse flow channels position of Z-type runner and outlet transverse flow channels;
3b) longitudinal runner of coordinate augment direction N ' bar Z-type runner is distinguished the longitudinal runner 1 of called after, longitudinal longitudinal runner N ' of runner 2 in the x-direction;
3c) the entrance transverse flow channels that is parallel to Z-type runner in the y-direction coordinate augment direction do the entrance transverse flow channels of a N '-1 Z-type runner, coordinate augment direction is by the entrance transverse flow channels of N ' bar Z-type runner called after entrance transverse flow channels 1, entrance transverse flow channels 2 entrance transverse flow channels N ' respectively in the y-direction; And the outlet transverse flow channels that is parallel to Z-type runner in the y-direction coordinate reduce direction and do the outlet transverse flow channels of a N '-1 Z-type runner, by the transverse flow channels of N ' bar Z-type runner exit, called after outlet transverse flow channels 1, outlet transverse flow channels 2 export transverse flow channels N ' to coordinate augment direction respectively in the y-direction;
3d) connect successively the longitudinal runner of Z-type runner, Z-type runner entrance transverse flow channels and Z-type runner exit transverse flow channels, the runner that the outlet transverse flow channels of longitudinal runner of the Z-type runner that deletion name label is not identical, the entrance transverse flow channels of Z-type runner, Z-type runner is connected, obtains N ' bar Z-type runner;
3e) add fillet at the knuckle place, right angle of N ' bar Z-type runner, determine Z-type runner axis line track, and Z-type runner geometric cross section is stretched along Z-type runner axis line track, thereby determine T/R assembly Z-type runner geometric model.
6. the active phase array antenna Z-type runner cold drawing method for designing based on device layout according to claim 1, it is characterized in that described step 4) in the finite element model of active phase array antenna linear array comprise Z-type runner cold drawing, T/R assembly, reinforcement and antenna element.
7. the active phase array antenna Z-type runner cold drawing method for designing based on device layout according to claim 1, it is characterized in that described step 5) in the index request of active phase array antenna thermal design comprise that heater members limiting temperature, heater members limit the temperature difference and limit cold drawing pressure drop.
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| CN104166765A (en) * | 2014-08-15 | 2014-11-26 | 西安电子科技大学 | Active phase-array antenna cooling plate electromechanical heat coupling design method based on position of component |
| CN104244682A (en) * | 2014-10-08 | 2014-12-24 | 上海航天电子通讯设备研究所 | Liquid-cooling plug-in box for radar antennas |
| CN104701637A (en) * | 2015-02-12 | 2015-06-10 | 西安电子科技大学 | Method for compensating electrical property of deformable array antenna based on electromechanical coupling and least square method |
| CN105436504A (en) * | 2016-01-12 | 2016-03-30 | 中国电子科技集团公司第二十九研究所 | Thin-wall sealing liquid cooling channel based on metal quick forming technology |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104166765A (en) * | 2014-08-15 | 2014-11-26 | 西安电子科技大学 | Active phase-array antenna cooling plate electromechanical heat coupling design method based on position of component |
| CN104166765B (en) * | 2014-08-15 | 2017-02-08 | 西安电子科技大学 | Active phase-array antenna cooling plate electromechanical heat coupling design method based on position of component |
| CN104244682A (en) * | 2014-10-08 | 2014-12-24 | 上海航天电子通讯设备研究所 | Liquid-cooling plug-in box for radar antennas |
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| CN104701637A (en) * | 2015-02-12 | 2015-06-10 | 西安电子科技大学 | Method for compensating electrical property of deformable array antenna based on electromechanical coupling and least square method |
| CN105436504A (en) * | 2016-01-12 | 2016-03-30 | 中国电子科技集团公司第二十九研究所 | Thin-wall sealing liquid cooling channel based on metal quick forming technology |
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