CFD Analysis of the HyShot Vehicular Surface at Various Mach numbers

Wei Chee Tjong, Nyuk Wei Foo, Sajitha Ramasundara, Christopher Stade


Through this project, various numerical simulations were carried out to evaluate flow characteristics on the HyShot vehicle surface for several test points. The test points selected are essentially at the same altitude but are varied in speeds at Mach 2, 3, 4, 5, 6 and 7.4. Various adjustments were required for the Gridgen mesh file to output a reasonably accurate representation of the flow field by increasing the unstructured mesh cells. Computational Fluid Dynamics (CFD) was then carried out using Metacomp Technologies CFD++ program on the mesh file for the various speeds as mentioned. The entire CFD analysis was run twice to account for a worst-case scenario of maximum heat build up by defining the HyShot surface to be adiabatic, while a best-case scenario was carried out in the second block run by defining the HyShot surface to have a 300 K isothermal wall which simulates initial launch temperature and for heat transfer on the surface to occur in order to dissipate thermal loads. Subsequently, parameters such as shock characteristics, pressure, temperature and drag forces were analysed in detail to explain the simulated flow phenomena. Recommendations were then made for future development of the HyShot vehicle.

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