Research Fields
In the research field of wind energy utilization, investigation has been carried out on three key aspects:
Research on advanced design technology of large and super large wind turbine blades
Research on innovative aerodynamic field of wind farm
Research on wind energy heat utilization technology based on advanced thermodynamic cycle
In the research field of aero engine, investigation has been carried out on four key aspects:
General design technology of engine
Research on the new type compressor
Research on the counter-rotating turbine
Research on the short annular combustor
Based on our original entropy generation minimized shock wave ram compressing theory, we developed contra-rotating ram compressor and vaneless counter-rotating turbine techniques. By successfully using these techniques, our engine team develops a shock-in type contra-rotating engine with a thrust-weight ratio of 20%-40% higher than traditional engines, and an engine can be operated without mode conversion in a wide Mach numbers range between 0 to 4.
Team Building
In 2020, 9 full-time staff members were recruited, 7 doctoral students and 5 postgraduates were graduated. Currently, there are 45 stuff members, 15 of which have obtained senior professional title. There are 49 graduate students and 3 postdoctors.
Projects and Major Achievements
There are 39 undergoing projects in 2020, including 19 new projects, and CNY 151 million of research funding was allocated.
In the research field of wind energy, research on systemic applied basic scientific issues related to wind energy absorption, conversion, and transmission, such as wind turbine blades, wind farm, and wind energy heat utilization had been carried out.
In the aspect of wind turbine blades, the advanced aerodynamic, structural, load control and aeroelastic design technologies for large wind turbine blades under the inland complex terrain conditions have been constructed, and the meanstream 2MW blades has been developed. The main technical indicators reached international advanced levels, and the monopoly of foreign technology has been effectively broken.. Compared with the commercial blades, the annual power generation is increased by 2.18%, the weight is reduced by 3.7%, and the equivalent fatigue load of blade root is reduced by 7.62%.
In the field of wind farm, a high fidelity CFD method based on an advanced actuator line method and a new hybrid numerical scheme has been developed. A high-efficient and high-reliable double-Gauss wake analysis model, which fully reflects the evolution characteristics of near and far field wakes, has been constructed. The microscopic site selection research of wind farms under different atmospheric stability has been carried out, and the calculated results are in good agreement with the field tests, providing a technical basis for the realization of high-efficient, high-reliable and low-cost wind energy utilization.
In the aspect of wind energy heat utilization, in order to solve the major livelihood issues of clean heating in winter in northern China, the revolutionary clean energy technology concept for direct heating by wind energy is proposed. The wind abandon problem will be solved with the wind energy heat utilization technology. The prototype of 100kW wind turbine heating system has been developed and demonstrated in Huangdicheng Town, heating for 4000 m2 building of Dahua Group. The heating COP was greater than 3.0 and the heating cost was lower than 0.15 yuan /kWh, which lays a solid foundation for the industrialization promotion of the heating wind turbine system.
An efficient, highly reliable, and low-cost 100-kilowatt wind energy heating demonstration system has been developed. The system has a heating efficiency of more than 3.5, which can provide cold and heat sources for 5000m2 buildings. Compared with the traditional thermal systems, the cost is reduced more than 10%, filling gaps in domestic and foreign markets and leading the development of emerging wind and heat industries.
In the aircraft engine area, the research team conducted research on developing the novel aircraft engine with high thrust-to-weight ratio and novel aircraft engine with wide speed range. The novel aircraft engine with high thrust-to-weight ratio with entropy generation minimized shock wave supercharging compressor technology is developed. It is the first aircraft engine in the world achieved significantly increases the thrust-to-weight ratio by adopting the new type of aerodynamic layout. At present, this prototype engine can sustain itself and achieve low speed working conditions, which verified the engine's overall structure design and the new aerodynamic layout. This novel aircraft engine has important military and civilian values. The novel aircraft engine with wide operating Mach numbers integrates dual-flow air/fuel-rich gas thermodynamic cycle and entropy generation minimized contra-rotating ram compressor technology. At present, breakthroughs are achieved in the design of wide operating Mach number contra-rotating ram compressors and fuel-rich burnt gas driven large deflection contra-rotating turbine. These works are aimed to provide a single-engine solution for terrestrial space transportation system.
Patents and Paper
In 2020, 42 academic papers were published, among which 26 were indexed by SCI and 14 indexed by EI. 20 patents proposals were applied and 14 patents were authorized.
International Cooperation and Exchanges
Dr. SUN Xiangyu attended the International Rankine 2020 Conference-Advances in Cooling, Heating and Power Generation (Online). Dr. ZHANG Mingming, Dr. LIAO Caicai and Dr. CAI Chang attended the TORQUE 2020 (Online).
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Laboratory