Computer Science – Performance
Scientific paper
Jun 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994nal..rept...93i&link_type=abstract
In its Special Publication of National Aerospace Laboratory p 93-98 (SEE N95-34505 12-02)
Computer Science
Performance
Enthalpy, Hypervelocity Flow, Hypervelocity Wind Tunnels, Real Gases, Reentry Vehicles, Shock Tunnels, Simulation, Wind Tunnel Tests, Ground Tests, Pistons, Shock Wave Interaction
Scientific paper
One of the most important problems on a development of a reentry vehicle is the prediction of real gas effect. In order to obtain the real gas data of reentry by ground test, the hypervelocity wind tunnel having extremely high reservoir condition, in which temperature and pressure are up to 10,000K and 1,500atm, is required. A free piston shock tunnel is the most useful facility which can produce such hypervelocity flow. The National Aerospace Laboratory is planning to develop the large free piston shock tunnel which can simulate the reentry of HOPE. In the present paper, CFD applications to the design and operation of the free piston shock tunnel are studied. The two topics are presented. One is the quasi-1D simulation to predict actual performances of free piston shock tunnels. Other is the axisymmetric 2D simulation of the reflected shock-boundary layer interactions to clarify the mechanism of the driver gas contamination.
Itoh Katsuhiro
Takahashi Masahiro
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