| 多喷管射流气动声学特性的数值研究 |
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| 引用本文： | 胡声超,鲍福廷,赵瑜.多喷管射流气动声学特性的数值研究[J].推进技术,2012,33(3):430-435. |
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| 作者姓名： | 胡声超 鲍福廷 赵瑜 |
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| 作者单位： | 西北工业大学航天学院,陕西西安,710072 |
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| 摘 要： | 采用大涡模拟结合动力Smagorinsky亚格子模型对四喷管超声速高温射流进行了三维非稳态数值模拟。基于非稳态计算的结果,利用FW-H面积分方法对四喷管射流远场的声学特性进行计算,并将结果与单喷管得到的结果进行对比。结果表明,多喷管射流形成了复杂的流场,其产生的气动声场并不仅仅是单喷管简单的叠加,由于四股射流之间的相互影响使得声场也产生了新的特点,不但表现在总声压级数值上,还对改变了射流噪声辐射的指向性,最大声压级的位置由原来的50°左右变化到30°。
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| 关 键 词： | 多喷管 射流流场 气动声学 数值模拟 大涡模拟 |
| 收稿时间： | 8/9/2011 12:00:00 AM |
| 修稿时间： | 4/6/2012 12:00:00 AM |
Numerical Simulation for Multi-Jet Aeroacoustics |
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| HU Sheng-chao,BAO Fu-ting and ZHAO Yu.Numerical Simulation for Multi-Jet Aeroacoustics[J].Journal of Propulsion Technology,2012,33(3):430-435. |
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| Authors: | HU Sheng-chao BAO Fu-ting and ZHAO Yu |
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| Institution: | (College of Astronautics,Northwestern Polytechnical University,Xi’an 710072,China) |
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| Abstract: | Large Eddy Simulation(LES) with Dynamic Smagorinsky Sub-Grid Model(SGS) was applied to simulate the 3-D unsteady supersonic hot multi-jet flow.Based on the results of the simulation,far field aeroacoustics of multi-jet were predicted by the Ffowcs Williams-Hawkings(FW-H) surface integral method and the results were compared with single nozzle.It shows that the flow field of multi-jet is complicated and the sound fields are not just a simple superposition of single nozzle.Some new characteristics are shown up.It changes not only the Overall Sound Pressure(OASPL) profile,but also the direction of radiation from 50° to 30°. |
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| Keywords: | Multi-nozzles Jet flow Aeroacoustics Numerical simulation Large eddy simulation(LES) |
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