Transition prediction for supersonic and hypersonic boundary layers on a cone with angle of attack
Transition prediction for supersonic and hypersonic boundary layers on a cone with angle of attack
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DOI：
10.1007/s11433-009-0162-6
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发表时间：
2009-07
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影响因子：
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通讯作者：
Caihong Su;Heng Zhou
中科院分区：
文献类型：
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作者：
Caihong Su;Heng Zhou
边界层转捩预报一直是航空航天技术发展中亟待解决的问题之一，但由于问题的复杂性，目前尚无可靠有效的方法。本文介绍的方法已被认为是边界层转捩预报的一种有效方法。然而，它严重依赖于实验或经验。而在三维底流情况下，如有攻角的圆锥边界层，其应用效果并不令人满意。作者找到了问题的原因并提出了改进的方法，对于给定的测试用例，得到了比较满意的结果，而且不太依赖实验或经验。然而，在人们真正将这种方法应用于实际问题之前，还需要研究更多的测试用例。本文将研究改进的EN-N方法在有攻角锥体上超声速和高超声速边界层转捩预报问题中的应用。与实验和直接数值模拟结果进行了比较，证实了改进的eN方法的有效性和可靠性.我们还发现，可能有一个以上的ZARF为每个子午面，和哪一个应该选择的eNmethod已经澄清。
Transition prediction for boundary layers has always been one of the urgent problems waiting for a solution for the development of aero-space technology, yet there is no reliable and effective method due to the complexity of the problem. The eNmethod has been regarded as an effective method for the transition prediction of boundary layers. However, it heavily relies on experiment or experience. And in cases with three-dimensional base flow, for instance, the boundary layer on a cone with angle of attack, the result of its application is not satisfactory. The authors have found its cause and proposed the method for its improvement, which did yield the fairly satisfactory result for a given test case, and also did not rely so much on experiment or experience. However, before people can really apply this method to practical problems, more test cases have to be studied. In this paper, more test cases for the application of the improved eNmethod to problems of transition prediction of supersonic and hypersonic boundary layers on cones with angle of attack will be studied. The results are compared with those obtained by experiments and/or direct numerical simulations, confirming that the improved eNmethod is effective and reliable. We also find that there may be more than one ZARF for each meridian plane, and which one should be chosen for the eNmethod has been clarified.