| 1 | Dynamic stability characterization of re-entry modules at hypersonic mach numbers显示文摘At the time of re-entry modules entering into the atmosphere from space,a small perturbation introduces dynamic oscillations on the vehicle because of their extreme traveling speed.The dynamic stability characteristics of re-entry modules at hypersonic Mach numbers is of considerable relevance to their initial design.In the present paper,the dynamic stability of blunt cone model about 10◦is examined with wide range of design parameters such as nose bluntness,semi-vertex angle and center of rotation through theoretical and experimental methods.Theoretical approximations are made over a model based on the standard Newtonian theory.Experiments are conducted at 0.25m hypersonic wind tunnel at M=8.3 and the following trends are observed from the experimental analysis.Interestingly,the incremental higher nose bluntness,semi-vertex angle and center of rotation reduce the dynamic stability.At higher hypersonic Mach numbers(M>10),dynamic stability characteristics of the re-entry module are insensitive to the free stream Mach number.However,it is observed that the dynamic stability is increased in proportion to the vibration amplitude at hypersonic speeds. | J.Vinoth J.Bruce Ralphin Rose | 2017 | International Journal of Modeling, Simulation, and Scientific Computing2017，8，1： | 0 |
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