Analysis of temperature field and noise characteristics of impinging jet of carrier-based aircraft engine

1 Hunan Provincial Key Laboratory of Mechanical Equipment Health Maintenance, Hunan University of Science and Technology, Xiangtan 411201, China 2 School of Mathematics and Computational Science, Hunan University of Science and Technology, Xiangtan 411201, China 3 Key Laboratory of Pneumatic Noise Control, China Aerodynamics Research and Development Center, Mianyang 621000, China Abstract: ［Objectives］As the deflection angle has great influence on temperature and noise radiation near the deflector of the impinging jet of a carrier-based aircraft, determining an appropriate deflection angle can expand the safe area around the aircraft.［Methods］This paper analyzes the flow field, temperature field and sound field characteristics near the deflector of a certain type of engine tail nozzle in full afterburner conditions under different deflection angles (β=35°, 45°, 55°) and different monitoring distances (S=20D, 30D, 50D, 80D). Using large eddy simulation (LES) and acoustic analogy methods, a calculation model of a supersonic jet impinging on an inclined plate is established, and the correctness of the model verified by experimental data.［Results］The deflection angle changes the distribution of the temperature field. When β=45°, the deflector has a better effect, personnel and equipment behind the deflector can be protected most effectively, and the high-temperature reflux on the countercurrent side of the deflector will affect the carrier aircraft. The rear wheel basically has no effect. The deflection angle also has great influence on far-field radiated noise. When noise monitoring distance S=40D , the total sound pressure level increases with the increase of the deflection angle. When β =35°, the noise radiation range affecting the normal work of personnel is at its smallest. ［Conclusions ］ In general, when β =45°, personnel and equipment near the deflector suffer the least high temperature and noise threat. Even so, in order to ensure that the ground crew can work normally at any angle, the tail nozzle should be kept above 80D. Key words: carrier aircrafts；tail nozzle；deflector；jet impact slant plate；noise characteristics

收稿日期: 2020–08–08 修回日期: 2020–11–27 网络首发时间: 2021–04–23 10:56基金项目:国家自然科学基金资助项目(51875194)；湖南省自然科学基金资助项目 (2020JJ4306)作者简介:齐龙舟，男，1999 年生，硕士生。研究方向：射流冲击噪声。E-mail：1287211457@qq.com冯和英，女，1983 年生，博士，副教授。研究方向：气动噪声控制。E-mail：fengheying@hnust.edu.cn *通信作者:冯和英