Research work has been centered on hypersonic propulsion technology. The main research areas include:
Engine control and detection, mainly involving modeling, control theory, fault detection and diagnosis technology, etc. ; Research on active thermal protection of engines with chemical reactions, mainly involving flow, heat transfer, chemical reaction kinetics, etc.; Supersonic combustion theory, mainly involving combustion, supersonic flow, plasma flow, etc.;
New concept promotion Theory, including magnetic fluid engine, variable structure engine, etc. All research involves theory and experiment, and has relatively complete experimental equipment and calculation methods. The scramjet engine is the propulsion device for hypersonic cruise missiles, transatmospheric vehicles and reusable space launchers. It is the technological commanding heights of aerospace power devices and is of extremely important significance to national defense construction and the development of space technology. The following innovative results have been obtained:
In terms of theoretical research on new cycles of hypersonic propulsion, a new cooling method-cooling cycle that can solve the problem of limited low-temperature heat sources is proposed to solve the problem of insufficient fuel heat sinks in the world. It provides a new research idea for reusing fuel heat sink, which includes two types: open cooling cycle and closed cooling cycle. The active cooling system of the scramjet engine was studied as a heat recovery process for the engine's waste heat recovery. The study found that the engine performance parameters can be improved by more than 10% after considering the heat recovery. A new concept of hypersonic propulsion based on magnetic fluid power generation energy bypass and arc energy injection is proposed: MHD-ARC-RAMJET combined cycle.
Carry out research on the design of active thermal protection channels for engines with chemical cracking, and propose a set of engine active thermal protection structural design methods to solve the problem of matching fuel heat release and fuel heat absorption in the design of thermal protection systems; A memory alloy adaptive enhanced heat transfer concept is proposed, which expands the enhanced heat transfer theory and technical scope; a low heat flow center combustion combustion chamber structure is proposed. According to the above design ideas, a scramjet engine model prototype that can work for a long time on the ground was developed and passed the test assessment.
In terms of ramjet engine control and detection, a hypersonic aircraft/engine integrated regulation/protection switching control method is proposed, which can ensure that the working status of the aircraft and engine are far away from the safety boundary. A pneumatic high-temperature regulating valve structure is proposed, which can be applied to high-temperature fuel flow regulation of scramjet engines and high-temperature gas regulation of solid rocket ramjet engines. Both have passed long-term work assessment tests and filled the domestic gap.
The research conducted has been supported by the National Natural Science Foundation, the Ministry of Education’s New Century Talent Support Program, major national projects, basic national defense research, the Aerospace Science and Industry Group, the Aerospace Science and Technology Group, etc., and has obtained scientific research projects He has more than 30 projects, published 90 papers, including 43 SCI papers, 85 EI papers, applied for 25 invention patents, 9 of which have been authorized.