跨音速压缩机级强制响应的数值研究--利用实验验证凸显挑战

IF 1.3 Q2 ENGINEERING, AEROSPACE
Nicklas Kilian, Fabian Klausmann, Daniel Spieker, H. Schiffer, M. G. Salas
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引用次数: 0

摘要

建立了一个实验支持模拟流程链,以便在不同运行条件下对跨音速高压压缩机前级进行数值强迫响应分析。转子上游使用了尾流发生器,以激发压缩机工作范围内的特定共振。因此,从达姆施塔特技术大学的达姆施塔特跨音速压缩机测试设施的最先进钻机测试中获得的大量空气动力和结构动态实验数据被用来验证数值结果,并确保边界条件的真实性。在此过程中,在接近所研究共振的稳定运行条件下进行的五孔探针测量验证了稳定空气动力学。随后,通过数值获得的气动弹性量,如共振频率和阻尼,以及最大交变叶片应力和叶尖偏转,与叶尖计时实验数据进行了比较。通过考虑有关气动壁面功密度和二次流现象的数值结果,可以证实并更好地解释阻尼的实验趋势。在数值结果和实验结果中都没有观察到不同加载条件对共振频率的影响。一般来说,交变叶片应力和挠度似乎明显低于实验结果。然而,与气动阻尼类似,数值结果有助于更好地理解实验趋势。连续的实验验证显示了数值强迫响应分析设置的能力,并有助于突出挑战和识别潜在的进一步调整。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Numerical Investigation of Forced Response in a Transonic Compressor Stage—Highlighting Challenges Using Experimental Validation
An experiment-supported simulation process chain is set up to perform numerical forced response analyses on a transonic high-pressure compressor front stage at varying operating conditions. A wake generator is used upstream of the rotor to excite a specific resonance within the operating range of the compressor. Thereby, extensive aerodynamic and structural dynamic experimental data, obtained from state-of-the-art rig testing at the Transonic Compressor Darmstadt test facility at the Technical University of Darmstadt, are used to validate numerical results and ensure realistic boundary conditions. In the course of this, five-hole-probe measurements at steady operating conditions close to the investigated resonance enable a validation of the steady aerodynamics. Subsequently, numerically obtained aeroelastic quantities, such as resonance frequency, and damping, as well as maximum alternating blade stresses and tip deflections, are compared to experimental blade tip timing data. Experimental trends in damping can be confirmed and better explained by considering numerical results regarding the aerodynamic wall work density and secondary flow phenomena. The influence of varying loading conditions on the resonance frequency is not observed as distinctly in numerical, as in experimental results. Generally, alternating blade stresses and deflections appear to be significantly lower than in the experiments. However, similar to the aerodynamic damping, numerical results contribute to a better understanding of experimental trends. The successive experimental validation shows the capabilities of the numerical forced response analysis setup and enables the highlighting of challenges and identification of potential further adaptations.
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来源期刊
CiteScore
2.30
自引率
21.40%
发文量
29
审稿时长
11 weeks
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