Loss map for aeroengine turbine blade equipped with tip inlet squealer

IF 1.5 4区 工程技术 Q3 ENGINEERING, MECHANICAL
Jae Sung Jeong, Sang Woo Lee
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引用次数: 0

Abstract

The full loss data for the IS (inlet squealer) tip with the wide changes of squealer height (hst) and tip clearance (h) are measured in an aeroengine turbine blade cascade of downstream-to-upstream velocity ratio (VR) = 2.01 with a five-hole probe instrumentation system. The loss map shows that the variation of IS tip loss with hst/s is strongly dependent upon h/s, contrary to the full squealer tip case. The IS tip loss tends to increase with hst/s for low h/s, whereas it tends to decrease with hst/s for high h/s. The noticeable loss reduction by the IS tip can be attained when h/s ≥ 1.5 % especially for high hst/s. The comparison among IS tip losses in three cascades of VR = 1.2 (weak reaction), 2.01 (medium reaction), and 2.4 (strong reaction) reveals that the IS tip-to-flat tip loss ratio is affected considerably by VR (turbine reaction).

配备叶尖进气尖叫器的航空涡轮叶片损耗图
使用五孔探针仪器系统,在顺流与逆流速度比 (VR) = 2.01 的航空涡轮叶片级联中测量了进气尖叫器(IS)尖端的全损耗数据,尖叫器高度(hst)和尖端间隙(h)变化很大。损耗图显示,IS 叶尖损耗随 hst/s 的变化在很大程度上取决于 h/s,这与全尖叫叶尖情况相反。在低 h/s 条件下,IS 端部损耗随 hst/s 的变化呈上升趋势,而在高 h/s 条件下,IS 端部损耗随 hst/s 的变化呈下降趋势。当 h/s ≥ 1.5 % 时,尤其是高 hst/s 时,IS 尖头可明显减少损耗。在 VR = 1.2(弱反应)、2.01(中等反应)和 2.4(强反应)的三个级联中,IS 喷嘴损耗的比较表明,IS 喷嘴与平喷嘴的损耗比受 VR(涡轮反应)的影响很大。
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来源期刊
Journal of Mechanical Science and Technology
Journal of Mechanical Science and Technology 工程技术-工程:机械
CiteScore
2.90
自引率
6.20%
发文量
517
审稿时长
7.7 months
期刊介绍: The aim of the Journal of Mechanical Science and Technology is to provide an international forum for the publication and dissemination of original work that contributes to the understanding of the main and related disciplines of mechanical engineering, either empirical or theoretical. The Journal covers the whole spectrum of mechanical engineering, which includes, but is not limited to, Materials and Design Engineering, Production Engineering and Fusion Technology, Dynamics, Vibration and Control, Thermal Engineering and Fluids Engineering. Manuscripts may fall into several categories including full articles, solicited reviews or commentary, and unsolicited reviews or commentary related to the core of mechanical engineering.
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