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| Study on a Parametric Design Method for Blunting 3D Leading Edge with Specified Radius |
| Liu Jun, Fu Xiang, Wang Xiaoyan |
| College of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410073, China |
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Abstract The severe aerothermal environment for hypersonic vehicles requires that the sharp leading edge have to be blunted in engineering application. For hypersonic vehicles with complex configurations like chined waveriders, the profiles of upper/lower surfaces may vary greatly in different longitudinal sections, which brings it with 3-dimensional effect that makes it difficult to blunt the leading edge. So far, there are relevant 3D blunting methods that connect leading edge with vehicles’ surfaces smoothly, but the blunting radius at each leading edge point still cannot be specified. A parametric method for blunting 3D leading edge with specified radius is presented in this paper, an application example in chined waveriders is given, and the CFD simulation is carried out. Results show that this method can not only guarantee smooth connection between blunt leading edge and upper/lower surfaces, but also the shape changes continuously along the horizontal direction. It can also specify the blunting radius according to the requirement of thermal protection, so that the multidisciplinary coupling design of thermal protection and aerodynamic shape is realized. The method with wide adaptability has important practical value in the design of hypersonic aerodynamic configurations.
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Received: 12 October 2017
Published: 25 December 2017
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2018, Vol. 1 
