Abstract
The present study is concerned with the effect of Görtler vortices on hypersonic boundary-layer transition over concave surfaces. Numerical simulations and linear stability theory are performed to investigate the nonlinear development of Görtler vortices and interaction with Mack modes. The result indicates that the transition location from the linear growth to the nonlinear growth is affected by introducing Görtler mode at the inlet and different Mack modes, but the value of the linear growth rate and nonlinear rate differ a litter by different Mack modes. Transition location moves ahead when Görtler mode interacts with Mack modes. Whereas, the forward distance induced by Görtler mode differ very few to Mack modes with different spanwise wavelength. Thus transition advance by introducing Görtler mode has no obvious wavelength selection mechanism for different Mack modes under the scope of calculated spanwise wavelength.
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Yu, M., Yang, Wb., Yuan, Xj. (2019). Numerical Study of Görtler Vortices on Hypersonic Boundary-Layer Transition. In: Zhang, X. (eds) The Proceedings of the 2018 Asia-Pacific International Symposium on Aerospace Technology (APISAT 2018). APISAT 2018. Lecture Notes in Electrical Engineering, vol 459. Springer, Singapore. https://doi.org/10.1007/978-981-13-3305-7_33
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DOI: https://doi.org/10.1007/978-981-13-3305-7_33
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