Numerical Simulation Of Gas-Solid Two Phase Flow Around Jet Vane And Study Of Its Test

As one kind of thrust vector control (TVC)technologies, the jet vane is often used to defending missiles, especially in vertically launched tactical solid missiles, such as GGM(ground to ground missiles), GAM(ground to air missiles), SSM(ship to ship missiles) and so on. Because of its advantages, including the big missile directional scopes produced by jet vanes' azimuth, the short response times and the lower ballistic path highest points, this kind of TVC technology has been gradually used in AAM(air to air missiles) in many countries recently. However, after installing jet vanes in the narrow space near the AAM motor nozzle, the gas flow field changes extremely complex. In the meantime, the gas-flow with high temperature and high pressure contains some solid particles, and it will ablate and erode the jet vane badly. Therefore, it is very important and necessary to specially research the gas-solid two phase flow properties, the jet vane geometric structure design and its aerodynamic properties. Aiming at above problems, in this thesis, the pure gas phase flow and the gas-solid two phase flow around the jet vane and the aerodynamic properties of jet vane are studied by using the numerical simulation method and tests. The main researches are as follows:1. Based on k-s two equations, the physical model of pure gas phase flow fields around the jet vane is established and the relevant boundary conditions and numerical method are given. By the numerical simulation, the flow field structures around the jet vane and aerodynamic properties of the jet vane are obtained under the different rotation angles. These data is helpful for the researching on the gas-solid two phase flow properties.2. Establishing the physical model of the gas-solid two phase flow around the jet vane, the corresponding boundary conditions of the flow fields are proposed and the numerical simulation is carried out. The aerodynamic properties of jet vanes and bases are obtained. The main influence factors on the flow field structure and the particle deposition on jet vane surfaces and the relations between those factors are analyzed. The lift forces and resistance forces of jet vanes and bases at different rotational angles are given.3. With the aid of the six component force test equipment, the bench test of the jet vane controlled missile is carried on. For the concerned lift forces and resistance forces at different rotational angles, their test and calculated data are in better accordance. It is proved that the numerical simulation and mathematical model in this paper are accurate and credible, and they can be effectively used for the aerodynamics properties design of jet vane. Additionally, the ablation images, fracture images, cross section microstructures and EDS chemical constituents at different positions of the jet vane after the bench test are analyzed, and the ablation mechanism is primarily studied.This paper researches the aerodynamic properties of the jet vane and the influence laws of the jet vane rotation angles, the distribution of solid particles and the wall property on the flow fields around the jet vane. These results are significant to the design and application of AAM, and supply a fundament to the theory research of ablation mechanism of this kind of jet vanes.