Fundamental study on the innovative film cooling technologies to suppress the mixing process with adding swirling motion to the coolant

通过向冷却剂添加旋流运动来抑制混合过程的创新薄膜冷却技术的基础研究

• 批准号: 23560229
• 负责人: TAKEISHI Kenichiro
• 金额: $ 3.24万
• 依托单位: Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011 至 2013
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23560229/
• 关键词: 物質伝達; 熱伝達; フィルム冷却; 旋回流; 感圧塗料; レーザ誘起蛍光法; PIV; ガスタービン; フイルム冷却; レーザー誘起蛍光法; 熱工学; PSP; LIF; RANS; LES; 混合; 光学測定

This study has been conducted to investigate a new film cooling method that utilizes swirling coolant flow through circular and shaped film cooling holes. The mixing phenomena with a film cooling air and a mainstream was measured by a instantaneous and simultaneous LIF and PIV methods, and the film cooling effectiveness on the wall was measured by PSP.It appeared from the results that, in the case of a circular film-cooling hole, the penetration of the coolant jet into the mainstream was suppressed by the strong swirling motion of the coolant and attained 100% heigher film cooling effectiveness. As a result, the film cooling effectiveness on the wall maintained a higher value behind the cooling hole over a long range. Additionally, the kidney vortex structure disappeared. For the shaped film cooling hole, the coolant jet spreads wider in the span-wise direction. Thus, the pitch-averaged film cooling effectiveness downstream was 50% higher than that in the non-swirling case.

本文研究了一种新的气膜冷却方法，即通过圆形和定形气膜冷却孔的旋流冷却。用瞬时和同时的LIF和PIV方法测量了气膜冷却空气和主流的混合现象，用PSP测量了壁面气膜冷却效率。结果表明，在圆形气膜冷却孔的情况下，冷却剂的强烈旋转运动抑制了冷却剂射流对主流的穿透，使气膜冷却效率提高了100%。因此，壁面上的气膜冷却效率在较长的距离内保持在冷却孔后面较高的值。此外，肾脏涡旋结构消失。对于成形的气膜冷却孔，冷却剂射流在跨度方向上扩展较大。因此，下游的螺距平均气膜冷却效率比非旋流情况下高50%。

项目成果

A Review of Turbine Film Cooling

涡轮气膜冷却综述

• 发表时间: 2014
• 作者: Takeishi;K.
• 通讯作者: K.

Quantitative measuring methods applied for the mixing phenomena of film cooling

• DOI: 10.2495/ht140421
• 发表时间: 2014-07
• 期刊: WIT transactions on engineering sciences
• 作者: K. Takeishi;M. Komiyama;Y. Oda

旋回を付加したフィルム冷却に関するLES解析

添加旋流的气膜冷却的 LES 分析

• 发表时间: 2014
• 作者: Takeishi;K.;小田豊,武石賢一郎,大塩哲哉
• 通讯作者: 小田豊,武石賢一郎,大塩哲哉

An Experimental Study on a Film Cooling with Swirling Coolant Flow on the Endwall of a High Loaded First Nozzle

高负荷第一喷嘴端壁旋流冷却液膜冷却实验研究

• 发表时间: 2012
• 作者: Kondo;S.;Takeishi;K.;Oda;Y.;and Schappals;M.
• 通讯作者: M.

旋回流を伴うシェイプトフィルム冷却に関する研究

旋流成形气膜冷却研究

• 发表时间: 2010
• 作者: 清水 大;武石 賢一郎;小田 豊;永川 悠太;近藤慎平,武石賢一郎,永川悠太,北村剛
• 通讯作者: 近藤慎平,武石賢一郎,永川悠太,北村剛