Effects of Turbulence Model on Prediction of Hot-Gas Lateral Jet Interaction in a Supersonic Crossflow

DeSpirito, James

doi:10.2514/6.2015-1923

Cited by 5 publications

(1 citation statement)

References 26 publications

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“…Christie [11] compared the numerical results of a flat plate and a missile with four turbulence models. DeSpirito [12] used nine turbulence models derived from standard one-and two-equation models to compare the jet interactions of cold air, hot air, and hot gas jet cases. The jet interactions of a generic missile at several jet conditions were investigated, and the effects of flux functions were compared in a previous numerical study [13].…”

Section: Introductionmentioning

confidence: 99%

Solving the Moment Amplification Factor of a Lateral Jet by the Unsteady Motion Experimental Method

Xue

Zhang²,

Cao

et al. 2022

Applied Sciences

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In this paper, unsteady motion tests of a lateral jet adjusting an air vehicle’s attitude are carried out. Curves of pitch moment amplification factors (KM) for a lateral jet versus angle of attack (α) are obtained using a wind tunnel free-flight test technique with a jet and data processing method. This new method overcomes the disadvantage of previous experiments that can study only one unsteady characteristic. The free-flight test technique in the proposed method ensures that the test model can be coupled in real-time with multiple parameters (unsteady flow caused by the jet, unsteady air vehicle aerodynamic force, and unsteady air vehicle motion). This approach simulates an actual air vehicle’s complete jet test process and ensures more authentic and reliable test results. In the new data processing method, continuous data curves are fitted to discrete data points, making it easier to convert the angular displacement versus time curve into the pitch moment versus α curve to obtain KM. The results show that when the pressure of the micro high-pressure gas cylinder is 2.0 MPa, KM is below 1, indicating that the lateral jet does not significantly promote the pitching moment. When the gas cylinder pressure is 4.0 MPa and the angle of attack is 5° < |α| < 16°, KM is greater than 1, and the lateral jet promotes the pitching moment. When 16° < |α| < 20°, KM is less than 1, and the lateral jet does not significantly contribute to the pitching moment. It was further found that KM decreases slowly with increasing α. When |α| > 30°, the influence of the jet on the pitching moment nearly disappears.

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Section: Introductionmentioning

confidence: 99%