Experimental verification of the feasibility of a 100 W class micro-scale gas turbine at an impeller diameter of 10 mm

Abstract

Feasibility of a 100W class micro-scale gas turbine with centrifugal impeller of diameter 10mm has been studied experimentally. The rotor that is required to rotate at 870,000 rpm to generate the compressor pressure ratio 3 has successfully been achieved the stable operation by using hydroinertia gas bearings. The compressor efficiency higher than that required by the target cycle has been measured. The combustor has achieved stable self-sustained combustion at the combustion efficiency higher than 99.9%. The heat conduction analysis based on measured data showed that it is possible to keep the compressor under the compressor exit temperature 170degC when the turbine inlet temperature is 1050degC. Based on these results, the feasibility of the micro-scale gas turbine at impeller diameter 10mm has successfully been proven at component level.

Improving the Efficiency of Electrical High-RPM Generators With Permanent Magnets and Tooth Winding

“…Therefore, research on the reduction of losses in HSEMPM has been widely discussed [13][14][15][16][17][18][19][20][21][22]. Papers of Borisavljevica et al, Munteanu et al, and others provide general approaches to the HSEMPM loss analysis, losses in the rotor permanent magnets are studied, as well as aerodynamic losses, and losses in HSEMPM winding [13][14][15][16][17][18].…”

“…Papers of Borisavljevica et al, Munteanu et al, and others provide general approaches to the HSEMPM loss analysis, losses in the rotor permanent magnets are studied, as well as aerodynamic losses, and losses in HSEMPM winding [13][14][15][16][17][18]. Papers [18][19][20] provide studies of losses in HSEMPM with tooth winding. The advantage of this type of electric machines, in addition to all the above, is the minimum dimensions of the frontal parts, which makes them virtually the only effective solution for the transport and aerospace industries [21].…”

Transients in Ultra-High-Speed Generators of Micro-Sized Gas Turbines

“…Therefore, international research groups and industrial corporations [8][9][10][11][12][13][14] is engaged in research and development of micro-sized power systems, representing the gas turbine shaft which is a high-speed micro-generator (MG) with permanent magnets (PM) connected with the control system ( Figure 1). To achieve maximum energy density rotational speed of the gas turbine and MG should be as high as possible.…”

“…IHI Corporation is developing a system with the rotational speed of 490,000 rpm and a power of 400 W [12]. Similar work is carried out by the Onera research center.…”

Dynamic Thermal Processes in Ultra-High-Speed Microgenerators for Uav

“…The rotor speed of the microgenerator is 400,000 rpm, and power is 400 watts. Microgenerator type is magnetoelectric, and bearing supports are gas-dynamic [7]. IHI has paid a lot of attention to the creation of thermal resistance between the turbine and the MEEC, but the thermal investigation of the MEEC is not considered.…”