Beijing Institute of Technology, China

Brief Biography:
Prof. Li got his bachelor's degree and PhD degree in Beijing Institute of Technology in 1996 and 2001, and now devoted to the research in fluid dynamics, combustion of a rocket motor early to the PhD stage, especially in the field of hot gas flow coupled with combustion phenomenon, fluid field characteristics research, gas jet injected in different environments such was water or air, and the systematic design and optimization of hot gas jet devices, computation fluid dynamics(CFD) etc. 

Now hosting characteristics prediction of the hot gas injected into water program supported by the NSFC and the other foundations from MOE and enterprises. The key points of the program is to probe the behavior of the jet exhaust and the influence to the vehicles/environments.

 
Speech Title:
Design and Numeric Simulation on the Solid Propellant Microthruster for Cubesat
 
Abstract:
The solid propellant microthruster is definitely a new class of micropropulsion system for the future microspacecraft, such as pico/nano-satellite and cubesat etc. It presents many advantages over other propulsion systems such as lesss system complexity, easy to controlling, no moving parts, and no propellant leakage possibility. The miniature of the system is not simply reductions in size, manufacture and capability of the normal size one.The matrix arranged solid propellant microthruster is a feasible way to overcome the one-shot limitation of it and has been used in many applications such as interception missiles, KKVs etc. The fire test of a standalone prototype microthruster was conducted to validate the numerical simulation conclusion. The theoretical specific impulse of the propellant was 255s. The efficiency, as well as matching capability between the ignitor and the main charge, was 84.3% calculated from the F-t curve. The size of the microthruster mainly affects the flow fields, heat transfer process between gas and nozzle cases, thus causes great loses of the microthruster’s efficiency.