Reseach on the reduction of rocket motor jet noise by water injection

Zou, Hao; Xu, Yi; Li, Yu Lin

doi:10.1051/matecconf/20166301023

Cited by 1 publication

(1 citation statement)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The simulation results of the gas injection water field are compared with the experimental results of related literature to ensure that the boundary conditions used in the numerical simulation are consistent with the parameters in the test, so as to verify the accuracy of the numerical model used. Figure 5 shows the water injection test process carried out in the literature [20], which has great similarity with that studied in this paper. Therefore, this test can be used as a reference, where the test system consists of a scaled-down engine, a fixed stand and a water injection device, etc.…”

Section: Numerical Model Experimental Validationmentioning

confidence: 77%

Research on the Cooling Effect of Water Injection of the Deflector on Flame of the Vertical Launch Missile

Zhang

Jiang

Zhang

et al. 2023

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

The high-temperature gas generated by the missile launch will cause serious ablation to the launcher. In order to study the thermal protection of the launch device, a scheme of arranging vertical upward water spray pipes in the deflector is proposed, which realizes the thermal protection of the launcher by the vaporization and heat absorption principle of liquid water and the impact effect. Based on the Mixture multiphase flow model, coupled with the vaporization equation of liquid water and the component transport model, the cooling mechanism and effect of the proposed scheme are analyzed. Meanwhile, the numerical simulation of gas flow field under different water injection speed conditions is carried out, and the change law between different water injection speed and cooling effect is obtained. The results show that after the water sprayed by the pipes laid in the deflector, a water film will be formed on the surface of the deflector and the wall of the launch vehicle, which plays a role in the isolation of the high-temperature gas. The temperature of the launch device drops significantly. With the increase of water injection speed, the thickness of the water film formed on the surface of the deflector and the wall of the launch vehicle becomes larger, and the isolation effect on the gas becomes more obvious. When the water injection speed increases to 55m/s, the vaporization rate of liquid water in the direct impact area of the gas jet reaches the maximum, the heat absorption is the most at the same time, and the temperature in this area reaches the lowest level. The cooling effect of the water spray speed of 55m/s on the flow field is the best. This conclusion can provide a theoretical reference for the thermal protection design of missile launcher.

show abstract

Section: Numerical Model Experimental Validationmentioning

confidence: 77%