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| The Study on Numerical Simulation of GJB 150A Rain Test Enhancement Test Procedure and Experimental Device Design |
| Received:June 15, 2021 Revised:August 08, 2021 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/issn.1672-9242.2021.10.022 |
| KeyWord:rain test enhancement test procedure flow field analysis design of test device |
| Author | Institution |
| WANG Xiao-sen |
Beijing Institute of Structure and Environment Engineering, Beijing , China;Tianjin Aerospace Reliability Technology Co.Ltd, Tianjin , China |
| SHAO Kang |
Beijing Institute of Structure and Environment Engineering, Beijing , China;Tianjin Aerospace Reliability Technology Co.Ltd, Tianjin , China |
| TAO Lin |
Beijing Institute of Structure and Environment Engineering, Beijing , China;Tianjin Aerospace Reliability Technology Co.Ltd, Tianjin , China |
| DONG Long-lei |
School of Aeronautics and Astronautics, Xi¢an Jiaotong University, Xi¢an , China |
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| Abstract: |
| The paper aims to study the engineering implementation method of enhancement test procedure in GJB 150.8A—2009, Laboratory Environmental Test Methods for Military Materiel Part 8:Rain Test. Based on the interpretation of the standard, a numerical model was established to analyze the flow field distribution of the nozzle during the enhancement test procedure. Based on the analysis results, the design idea and method of the enhancement test procedure test device were given. The results show that the pressure changes sharply in the nozzle, which changes from 276 kPa to 101 kPa in a very short distance from the inlet to the outlet. The flow of water undergoes a violent acceleration process through the nozzle, from 0.01 m to 0.4 m away from the nozzle outlet, the water flow velocity rapidly decreases from 251 m/s to 17.8 m/s, and tends to be stable in the far field. The analysis results have important reference significance to guide the design and implementation of enhancement test procedure test device. |
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