ABSTRACT: The steady-state aerodynamic characteristics of a new family of blunted leading edges immersed in high-speed rare¯ed air °ow are examined by using a Direct Simulation Monte Carlo Method. A very detailed description of the aerodynamic surface quantities on the bodies has been presented by a numerical method that properly accounts for non-equilibrium e\uaeects that arise near the nose of the leading edges and that are especially important at high Mach number. Comparisons based on geometry are made between these blunt con¯gurations and circular cylinder shapes. Some signi¯cant di\uaeerences between these shapes is noted on the aerodynamic surface quantities. It is found that the heat transfer coe\ub1cient at the stagnation point decreased with increasing the °at-nose of the leading edges. The analysis also showed that, despite the seeming advantages of the new blunt shapes, circular cylinder still provides smaller stagnation point heating, however large total drag under the range of condition investigated.
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