Research Fields
The team aims at R&D and system integration of small and medium gas turbines. The research projects are on related power system fundamental research, key technology R&D, system integration innovation, and engineering product research.
Research and development of aircraft-derived gas turbines for green energy. From basic combustion research, we develop innovative technologies for multi-fuel and low-pollution combustion, supporting the research and experimental development of gas turbines.
Research and application of microgrooves combined phase-change thermal management and energy saving technology. Research on efficient and clean combustion of aerospace fuels, microgravity combustion and VOC catalytic removal technology.
Research on comprehensive utilization of concentrated solar energy. Camouflage and stealth: through the masking and camouflage technology to conceal and reduce the detectability characteristics of the target.
Thermal function and thermal interface materials.
Research on structure optimization, material modification and related manufacturing processes based on additive manufacturing of high-end equipment.
Team Building
There are 25 staffs, including 4 professors (including 1 person who shares the benefits of special allowance of the State Council, 1 person from "Ten thousand plan" - National high level talents special support plan, 1 person from the 1000-person plan, and 1 from the 100-person plan), 3 associate professors, 5 Post Doctors; 16 postgraduate students(including 4 international students), 1 PhD candidates graduated.
Projects and Major Achievements
In the field of enhanced heat transfer mechanism of open capillary micronamo grooves, we explored the heat transfer mechanism of thin-film boiling in micro-grooves and conducted research on double boiling coupling surface strengthening technology.
In the LED lighting field, a project titled "Research on key technology of highefficiency and high-reliability LED lamps" supported by the National Key R&D Projects has successfully passed the project check. The research of light and heat integration for combined substrate with low expansion coefficient, high thermal conductivity and microgrooves heat sink was carried out, and the thermal resistance from the substrate to the cooler fin was significantly reduced to 0.0018°C/W. The weight of 1000 W microgrooves cooler was reduced to 7.6 kg. Besides, 16 demonstration projects of LED lamps have been demonstrated, and the cumulative economic benefit reaches over 1 billion CNY.
In the aspect of thermal management of high-power electronic and optoelectronic chips, an integrated thermal management system for 10 kW high-performance server chips for supercomputing center has been developed: 1U chassis unit cooling power≥1000 W, cabinet cooling power≥10 kW. With power consumption of 250 W for a single chip, the chip temperature is less than 70°C and the power usage effectiveness (PUE) is less than 1.07. In the aspect of aircraft-derived gas turbines, the construction of the ET20HAT gas turbine unit and the gas generator-power turbine matching test were all completed. The processing and manufacturing of the HAT combustor were completed, and it was successfully ignited and operated on the whole machine.
In the aspect of multi-fuel and low-pollution combustion technology research of gas turbines, we have developed a hydrogen low-pollution combustion chamber and completed the test verification of pure hydrogen fuel on a micro-combustion engine test bench with a pressure ratio of 4. The NOx emission is less than 6 ppm.
In the aspect of combustion chemistry, the pyrolysis, oxidation and combustion characteristics of real aviation kerosene RP-3 and mono-/bi-/ tri-component and low-carbon fuels such as amines under a wide range of conditions were revealed; the influence of fuel on intermediate products and reaction kinetics was analyzed; a chemical analysis method suitable for aviation fuel combustion was established; a fuel modification strategy was proposed to develop new efficient and clean alternative fuels; a photothermal coupled chemical experimental platform was built to study the conversion characteristics of fuels under different photon intensities; the controllable preparation of transition-state metal oxide catalysts was achieved, and single/ double/triple transition-state metal oxide films were successfully obtained to achieve clean removal of low-order VOCs; we completed the development of VOC catalytic removal prototypes, promoting industrial application; organized and held the 3rd International Discussion meeting on Chemistry and Technology of Combustion Application to promote international cooperation and exchanges.
In terms of comprehensive utilization of concentrated solar energy: Our team builded a basic and complete experimental instrument platform including preparation and measurement of solar cells. We successfully converted incident photons in the 980 nm that could not have been utilized by solar cells into visible light, achieving an optimal photoelectric conversion efficiency of 18.3% and a 10% efficiency improvement. The machine learning method is used to global optimization of the efficiency, filling factor and other key energy conversion performance parameters of the concentrating photovoltaic+thermoelectric hybrid power generation system. After optimization, the comprehensive power generation efficiency has reached 32.2%.
In terms of camouflage and stealth, a simulated obstacle camouflage technology has been developed. This technology samples and analyzes the results based on the optical, thermal infrared, radar and other characteristics of the target background, and uses various additional decorative pieces to simulate the background features of the obstacle surface. By improving the similarity between the optical, thermal infrared, radar and other features of the target and the background features, the target is better integrated into the background to conceal the real target or reduce its detectability features. It has been successfully used in military exercises on a certain base with an area of over 10 000 m2 .
In terms of high-thermal-conductivity thermal interface materials and new high temperature thermal insulation materials: oxide aerogel and its composites for low temperature, medium temperature and high temperature applications with a series of excellent properties have been developed, such as nano/micron/bimodal scale fiber reinforced oxide aerogel insulation boards/ felt, etc. A thermal management system has been developed for mobile high-temperature flue gas waste heat stealth, reducing the radiation temperature of high-temperature flue gas from over 200°C to an average temperature of 5.9°C. We developed a thermal interface material based on a brand new high thermal conductivity sponge filling structure, breaking through the traditional form of point or surface contact thermal conductivity pathways between fillers, and creatively introducing a three-dimensional porous mesh efficient thermal conductivity structure. Theoretically, the band structures and density of states characteristics of organic semiconductor C8-BTBT and its different chain-end group structures were studied using first principles calculations combined with Boltzmann semi classical theory. It was found that strain engineering can improve the thermoelectric performance of C8-BTBT based organic semiconductors by a maximum of 45.2%, which is a feasible way to regulate the band structure and transport coefficient.
In the aspect of hybrid additive manufacturing, the research on additive manufacturing of steel-copper composite structure is carried out for large ship propeller, and the preparation of defect free and high bonding strength dissimilar alloy composite structure is realized. The hardness of copper alloy cladding layer reaches 266 HV0.2. The ultimate tensile strength reaches 890 MPa, and the hardness and strength are greatly improved compared with traditional casting copper alloy; two nickel based transition layers are designed to further improve the corrosion resistance of steel copper composite structure.
There were 32 on-going projects during the year 2022: 6 projects of the National Key Research and Development Program, 4 projects of base and talent projects, 3 projects from CAS, and 19 industrial cooperation projects.
Patents and Paper
In 2022, a total of 50 academic papers were published, 35 of which are indexed by SCI; 32 patents and 8 software copyright were applied, and 22 patents were authorized.
Award
1. JS Science and Technology Progress Second Prize, JWKJW, (selected every two years, only 33 items nationwide).
2. ZHANG Hang was selected as a Fellow of the Engineering Science Society in the United States.
3. The 10th Entrepreneurship Award for Transformation of Scientific and Technological Achievements of the Chinese Academy of Sciences.
4. The Industry University Research Innovation Achievement Award from the China Association for the Promotion of Industry University Research Cooperation.
5. TIAN Zhenyu was awarded the honorary title of Vebleo Fellow of the international association.
Deprty Dean: MA Aidi 86-10-82543171 maaidi@iet.cn
Download the attachment
Laboratory