|Analysis of the test condition of a shock-expansion tube: JF-16|
|Hu ZM(胡宗民); Wu B(吴波); Jiang ZL(姜宗林)
|Source Publication||Proceedings of the First International Conference on High Temperature Gas Dynamics
|Conference Name||First International Conference on High Temperature Gas Dynamics
|Abstract||A shock-expansion tube (SET, named JF-16) has been built at the State Key Laboratory of High Temperature Gas
Dynamics (LHD) in order to generate relatively steady and clean test gas of really high enthalpy. However, the test time of a
SET is extremely shorter as compared to a reflected-shock tunnel (RST) of the same scale which results in difficulties in the
measurements and diagnostics. An applicable means to the flow diagnostics is the integrated computation-experiment
techniques. In this paper, some numerical issues occurring in our computational investigation for the test flow of JF-16 are
discussed. The dispersion-controlled dissipative scheme (DCD) is used to setup our SET simulation code. However, spurious
oscillation at the contact surface occurs when the original scheme is applied to the simulation of JF-16 test flow. A new flux
splitting algorithm based on local characteristics is worked out for the DCD scheme. Preliminary computations indicate that
the updated algorithm is more robust to suppress the aforementioned oscillation as compared to the original algorithm.
Several experiments with the typical hypervelocity test flow of JP-16 are computed and compared to validate the algorithms.
The computations of double-wedge flows indicate that the experimental visualization is mainly the self-illumination of
nitrogen atoms instead of the schlieren image.|
Hu ZM,Wu B,Jiang ZL. Analysis of the test condition of a shock-expansion tube: JF-16[C]Proceedings of the First International Conference on High Temperature Gas Dynamics,2012.
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