小型超音速機用エンジンの玉軸受の発熱・伝熱特性の解析的評価

抄録

In order to evaluate soundness of the bearing for the GG-ATR engine, its thermal characteristics were evaluated from the bearing temperature data obtained in the tests, and countermeasures were investigated for a critical situation during rated power operation. For the forward bearing, thermal characteristics evaluation and temperature history prediction had be carried out analytically. The result was showed that the bearing temperature during planned flight time does not greatly exceed the allowable temperature. For the rearward bearings, thermal characteristics could not be evaluated directly. Instead, by clarifying the cause of the bearing temperature behavior based on actual flow calculated by the internal flow network, an effective modification plan to safe operation of the bearing had been found.