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亚声速热射流声源模型的应用

张星辰 杨海华 万振华 孙德军

张星辰, 杨海华, 万振华, 孙德军. 亚声速热射流声源模型的应用[J]. 应用数学和力学, 2016, 37(12): 1308-1323. doi: 10.21656/1000-0887.370526
引用本文: 张星辰, 杨海华, 万振华, 孙德军. 亚声速热射流声源模型的应用[J]. 应用数学和力学, 2016, 37(12): 1308-1323. doi: 10.21656/1000-0887.370526
ZHANG Xing-chen, YANG Hai-hua, WAN Zhen-hua, SUN De-jun. Application of Sound Source Models to the Heated Subsonic Jet[J]. Applied Mathematics and Mechanics, 2016, 37(12): 1308-1323. doi: 10.21656/1000-0887.370526
Citation: ZHANG Xing-chen, YANG Hai-hua, WAN Zhen-hua, SUN De-jun. Application of Sound Source Models to the Heated Subsonic Jet[J]. Applied Mathematics and Mechanics, 2016, 37(12): 1308-1323. doi: 10.21656/1000-0887.370526

亚声速热射流声源模型的应用

doi: 10.21656/1000-0887.370526
基金项目: 国家自然科学基金(11232011;11402262;11621202)
详细信息
    作者简介:

    万振华,E-mail: wanzh@ustc.edu.cn

  • 中图分类号: O35

Application of Sound Source Models to the Heated Subsonic Jet

Funds: National Natural Science Foundation of China(11232011;11402262;11621202)
  • 摘要: 对亚声速转捩热射流中失稳波相关的噪声产生机制进行了研究,并与冷射流中的结果进行了对比.基于时均大涡模拟(LES)流场,通过求解线性抛物化稳定性方程(LPSE)得到了失稳波的空间演化特性,然后基于LPSE的解与声比拟方法构建了射流的线性及非线性声源模型.LPSE结果表明,加热可以提高失稳波的空间增长率,使其更早达到饱和.由线性模型分析可知,加热会提高高频模态的声压级(SPL).与冷射流相比,热射流中线性模型预测的声压级与大涡模拟结果间的差距更小,表明线性机制在热射流中作用更大.在亚声速冷射流中,非线性模型在之前的研究中已经被证明可以提高声辐射效率.在当前热射流中,发现非线性模型与大涡模拟间的声压级差距被进一步的缩小,且温度相关的声源项在声辐射中发挥更重要的作用.
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出版历程
  • 收稿日期:  2016-11-03
  • 修回日期:  2016-11-26
  • 刊出日期:  2016-12-15

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