Integration- and Intake-Induced Flow Distortions and Their Impact on Aerodynamic Fan Performance
Integration- and Intake-Induced Flow Distortions and Their Impact on Aerodynamic Fan Performance
复制标题
集成和进气引起的流动畸变及其对气动风扇性能的影响
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
Johakim Corroyer
中科院分区：
文献类型：
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作者：
R. Schnell;D. Schönweitz;Marius Theune;Johakim Corroyer
本文概述了DLR推进技术研究所在安装和进气诱导流畸变影响下专门评估风扇性能的最新活动。大多数的结果被认为是正在进行的工作，本文的目的只是提供一个总体概述，目前的研究需求，目前和未来的推进器驱动中型和大型发动机。本文的第一部分总结了在V2500跨音速风扇级上进行的地面诱导进气畸变研究。目的之一是为具有较高风扇总压比的实际发动机典型风扇级提供参考结果。全尺寸测量是在DLR的研究飞机ATRA上进行的，可以看到风扇吸入的气流结构，并与整个地面、短舱、进气道和风扇系统的全环、全耦合和非定常CFD模拟的计算数据进行直接比较。第二部分总结了两种不同总压比的风扇对一般但实际的进气畸变的灵敏度的比较。V2500风扇的非定常CFD计算结果将与风扇压比低得多的研究风扇（Fan 135）的计算结果进行比较。本文第三部分的重点是介绍紧密耦合进气道和风扇系统的设计方法，并介绍初步设计研究的结果，目的是将短和超短进气道与未来UHBR发动机的风扇压比FPR=1.35风扇相结合。
This paper provides a general overview of the most recent activities at DLR’s Institute of Propulsion Technology dedicated to the appraisal of fan performance under the influence of installation and intake induced flow distortions. Most of the results are to be considered work in progress and the intention of this paper is to merely provide a general overview of the current research demands for current and future propulsors powering medium and largely sized engines. The first part of the paper summarizes a ground induced inlet distortion study carried out with the V2500 transonic fan stage. One of the objectives was to provide reference results for a realistic and engine representative fan stage with a relatively high fan total pressure ratio. Full scale measurements were taken at DLR’s research aircraft ATRA, allowing for a visualization of the flow structures ingested by the fan and a direct comparison with computational data from full annulus, fully coupled and unsteady CFD simulations of the entire ground, nacelle, intake, and fan system. The second part summarizes the comparison of the sensitivity of the operational behavior of two fans with different total pressure ratios towards a generic yet realistic inlet distortion. Results from unsteady CFD computations of the V2500 fan will be compared with those of a research fan with a substantially lower fan pressure ratio (Fan135). The focus of the third part of this paper is to introduce a design methodology for closely coupled intake and fan systems and to present results from a preliminary design study, aiming at short and ultra-short inlets in combination with a fan pressure ratio FPR=1.35 fan being representative for future UHBR engines.