本文關(guān)鍵詞： 航空航天科學技術(shù)基礎(chǔ)學科 帶肋通道 旋轉(zhuǎn) 對流傳熱 數(shù)值模擬 壓力系數(shù)　出處：《兵工學報》2016年03期 　論文類型：期刊論文

【摘要】：為深入了解旋轉(zhuǎn)作用力對渦輪葉片多段連接通道換熱特征的影響,采用三維數(shù)值模擬方法研究了多段連接內(nèi)通道模型的流動換熱。選取通道入口雷諾數(shù)為17 000、旋轉(zhuǎn)數(shù)范圍為0~0.09,多段連接通道3個出口的質(zhì)量流量比例為25%、50%、25%,旋轉(zhuǎn)半徑與水力直徑之比的范圍為0~69.6,研究了旋轉(zhuǎn)數(shù)、旋轉(zhuǎn)半徑對各段通道帶肋壁面換熱分布的影響。結(jié)果表明:旋轉(zhuǎn)附加力造成徑向出流通道沿程壓力系數(shù)逐漸增大,徑向入流通道的沿程壓力系數(shù)迅速減小;徑向出流通道后緣面的換熱系數(shù)隨旋轉(zhuǎn)數(shù)增加而增大,徑向入流通道后緣面的換熱系數(shù)隨旋轉(zhuǎn)數(shù)增加而稍有減小,旋轉(zhuǎn)作用對前緣面換熱的影響情況與后緣面的情況相反;前、后緣面的換熱系數(shù)沿流向均隨旋轉(zhuǎn)半徑與水力直徑比的增加稍有增大,換熱增大幅度較小。
[Abstract]:In order to understand the effect of rotating force on the heat transfer characteristics of turbine blade multi-section connection channel. In this paper, the flow heat transfer of the multi-segment connected internal channel model is studied by using three-dimensional numerical simulation method. The Reynolds number at the entrance of the channel is 17 000 and the rotation number is 0 ~ 0.09. The mass / flow ratio of the three exits of the multi-section connecting channel is 25 / 50 and the ratio of the radius of rotation to the hydraulic diameter is 0 / 69.6. the number of rotations is studied. The effect of radius of rotation on the heat transfer distribution on the ribbed wall of each section of channel. The results show that the pressure coefficient of radial outlet channel increases gradually and the pressure coefficient of radial inlet channel decreases rapidly due to the additional force of rotation. The heat transfer coefficient of the rear edge of the radial outlet increases with the increase of the number of rotations, and the heat transfer coefficient of the rear edge of the radial flow channel decreases slightly with the increase of the number of rotations. The effect of rotation on the heat transfer on the front edge is opposite to that on the rear edge. The heat transfer coefficient of the front and rear edge surfaces increases slightly along the flow direction with the increase of the ratio of the radius of rotation to the hydraulic diameter, but the increase of heat transfer is smaller.
【作者單位】： 西安航空學院;西安航天動力試驗技術(shù)研究所;
【基金】：國家自然科學基金項目(51575420) 陜西省自然科學基金項目(2014JM2-5069) 西安市技術(shù)轉(zhuǎn)移促進工程-產(chǎn)學研合作重大項目(CXY1518(2))
【分類號】：TK401
【正文快照】： 0引言現(xiàn)代燃氣渦輪發(fā)動機燃氣的溫度已遠高于渦輪葉片材料的耐熱極限,必須對渦輪葉片采取有效的冷卻措施,才能使得燃氣渦輪發(fā)動機安全、穩(wěn)定、可靠的運行�，F(xiàn)代燃氣渦輪葉片多采用內(nèi)、外部組合冷卻方式,目的是借助最少的冷氣達到相對較好的冷卻效果;葉片內(nèi)部是采用多腔通道的，

本文編號：1473474