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| Discussion on Prediction Methods of Fluctuating Pressure Environments of Flow Fields Surrounding the Aircraft |
| Received:February 04, 2021 Revised:February 16, 2021 |
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| DOI：10.7643/issn.1672-9242.2021.03.003 |
| KeyWord:aircraft fluctuating pressure prediction method theoretical analysis wind-tunnel test numerical simulation |
| Author | Institution |
| MA Shi-wei |
Institute of System Engineering, China Academy of Engineering Physics, Mianyang , China |
| JIANG Hua-bing |
Institute of System Engineering, China Academy of Engineering Physics, Mianyang , China |
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| Abstract: |
| In order to predict fluctuating pressure environments of flow fields surrounding the aircraft, this paper, based on turbulence theory, analyzes the generative mechanism, flow characteristics and study difficulty of fluctuating pressure of the flow field around aircraft, discusses the prediction methods of fluctuating pressure environments by means of theoretical research, wind-tunnel test and numerical simulation, and compares the advantages and disadvantages of different research methods with the consideration of the characteristics of high Mach number and high Reynolds number. Finally, wind-tunnel test is a powerful method to obtain fluctuating pressure environments of aircraft. According to the experimental data of typical aerodynamic shapes, a series of semi-empirical correlations have been obtained by combining with theoretical derivation and analysis. The combination of time-averaged flow field and semi-empirical correlations can evaluate fluctuating pressure environments of the aircraft’s surface quickly, which is used widely in engineering. And direct numerical simulation can describe the flow field structure and predict fluctuating pressure environments accurately, so that it has a bright application prospect. In a word, wind-tunnel test, the prediction method based on semi-empirical correlations and time-average flow field, and direct numerical simulation can play an important role in predicting fluctuating pressure environments surrounding the aircraft. |
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