Towards the Development of the Finger top Gas Turbines

Abstract

， 7 − 3 − lHongo Bunkyo − ku， T(》kyo Ultra micro turbine concept based upon MEMS techno 且 ogy was proposed by MIT ， since then several prqjects have been initiated and sponsored by DARPA for its developrnent throughout the universities and research institutions in the US ． The present authors regard such ultra micro gas turbine engine systems to be crucial for the future mobi 畳 e and 出 endly energy ut 置 1ization system that anyone can e1tioy at any place on the g 且 obe 、 In this paper， our pa 且 m top gas turbine ( 2 − 3kW ， dry weight 14． 3kg included generator， rotational speed 235000rpm ， outer diameter 180mm ， 1ength 335mm ｝and finger top gas turbine test model ( tens of W ， rotationa 呈speed l l 70000rpm ． outer diameter 23mm ， 艮 ength 32mm ｝are described ．

Precision manufacturing of key components for an ultra miniature gas turbine unit for power generation

“…Given the need for high power density energy conversion in very small packages, a millimetrescale gas turbine is an obvious candidate. Because this concept was first explored in the mid 1990s, two different turbine size ranges are mainly investigated: a micro-range mainly based on MEMS approaches (Epstein 2004;Sun et al 2005;Kang et al 2004) and a mesoscopic range (Kang et al 2003;Matsuo et al 2003;Isomura et al 2005;Schneider et al 2005;Peirs et al 2004). Due to the limited material choice, design freedom and wafer thickness in MEMS technology, a pancake rotor design is usually obtained which restricts the target power output to 1-10 W, though very small components can be precisely manufactured.…”

Optimal micro channel recuperators for small-sized gas turbines

“…Hereby focus is especially put on technological requirements and low cost fabrication technology rather than on optimization for achieving maximal cycle efficiency [7]. Also at smaller scales, for micro gas turbines in the power range smaller than 3 kW, several micro recuperators are described in literature [8][9][10]. Thus far, almost no attention is paid to the generalization of these concepts in specific design rules.…”