Power law shapes for leading-edge blunting with minimal standoff distance in low-density hypersonic flow
The steady-state aerodynamic characteristics of power law shaped leading edges immersed in high-speed rarefied air flow are examined by using a Direct Simulation Monte Carlo method. The work is motivated by interest in investigating power-law shaped leading edges as possible candidates for blunting geometries of hypersonic configurations. The aerodynamic performance of power law shapes is compared to a corresponding round leading edge shape based on equivalent shock standoff distance. For the flow conditions considered, the analysis shows that round leading edges provide smaller stagnation point heating and smaller drag than power law shapes for equivalent shock standoff distance.
KeywordsStandoff Distance Direct Simulation Monte Carlo Hypersonic Flow Nose Radius Direct Simulation Monte Carlo Method
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- 3.W.F.N. Santos, M.J. Lewis: ‘Angle of Attack Effect on Rarefied Hypersonic Flow over Power Law Shaped Leading Edges’. In: 23rd International Symposium on Rarefied Gas Dynamics, Whistler, BC, Canada, July 20–25, 2002 Google Scholar
- 4.G.A. Bird: Molecular Gas Dynamics and the Direct Simulation of Gas Flows, 2nd edn. (Oxford University Press, Oxford, England, UK, 1994)Google Scholar
- 5.G.A. Bird: ‘Monte Carlo Simulation in an Engineering Context’. In: Progress in Astronautics and Aeronautics: Rarefied Gas Dynamics, ed. by Sam S. Fisher (AIAA, New York 1988) vol. 74, pp.239–255Google Scholar
- 7.W.F.N. Santos, M.J. Lewis: ‘Aerodynamic Heating Performance of Power Law Leading Edges in Rarefied Hypersonic Flow’. In: 36th AIAA Thermophysics Conference, AIAA paper 2003-3894, Orlando, FL, June 23–26, 2003 Google Scholar
- 8.W.F.N. Santos: Direct Simulation Monte Carlo of Rarefied Hypersonic Flow on Power Law Shaped Leading Edges. PhD Thesis, University of Maryland, College Park, MD, (2001)Google Scholar
- 9.W.F.N. Santos: ‘Shock Wave Shapes on Power Law Leading Edges’. In: 24th International Symposium on Shock Waves, Beijing, China, July 11-17, 2004 Google Scholar