A review of recent studies on rotating internal cooling for gas turbine blades

• 作者: Kirttayoth YERANEE Yu RAO
• 来源期刊: 中国航空学报（英文版）
• 年，卷（期）: 2021,（7）
• 页码范围: 85-113
• 页数: 29页
• 语种: 英文

摘要

Gas turbines have been used extensively for aircraft and marine propulsions as well as land-based power generation because of their high thermal efficiency and large power to weight ratios.To further increase the thermal efficiency,numerous prior researches on gas turbine blade internal cooling have been intensively carried out,majorly under stationary conditions.However,the stationary studies neglect the effects of Coriolis and buoyancy forces,which should change the velocity,turbulence and temperature distribution under rotating conditions.To elucidate the rotational effects on gas turbine internal cooling,the extensive results collected from recent inves-tigations are discussed,which include the rotation and buoyancy effects on the rib turbulated cool-ing,pin fin cooling,jet impingement cooling,dimple/protrusion cooling,latticework cooling as well as swirl cooling.The rotational effects on the friction factors and the most employed experimental and numerical methods are also presented.Moreover,recommendations for future research are out-lined.Therefore,this review article provides extensive literature information for the design of the next-generation high-efficiency internal cooling for rotating turbine blades.