采样探头几何形状对超音速气体流测量精度的影响分析

IF 4.6 Q2 MATERIALS SCIENCE, BIOMATERIALS
Wanlin Zhang, Yingtao Chen, Yanting Ai, Pengpeng Sha, Xinlong Yang
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引用次数: 0

摘要

气体成分的采样精度对航空发动机燃烧室内各种性能参数的测量具有重要影响。为了研究六点气体采样探头的探头几何形状对超音速气体流动中采样精度的影响,通过对传输和流固耦合成分的数值模拟方法,建立了三维探头气体流动特性求解模型。构建了 28°、30° 和 32° 三种角度的探头以及一个优化的锥形探头。通过采样前后成分体积分数的偏差以及由此产生的燃烧效率误差,比较和评估了不同几何形状探头的采样精度。本文提出了一套计算方法,通过基于理想气体定律和 Redlich-Kwong 方程(R-K 方程)的迭代法求解体积分数的相对偏差。该方法旨在解决模拟计算中的精确组分体积分数问题。研究结果表明,与原始的 30° 结构相比,28° 和优化的锥形探头能更有效地提高采样精度。两种结构的体积分数偏差小于 1.7%,燃烧效率误差小于 0.09%。所开发的迭代计算方法可将理论计算误差显著降低到 0.06% 以下。试验台的实验数据与模拟结果十分吻合,从而证明了结构优化后的取样探头的可靠性和准确性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Analysis of the Effect of Sampling Probe Geometry on Measurement Accuracy in Supersonic Gas Flow
The accuracy of sampling of gas components has a significant impact on the measurement of various performance parameters in the combustion chamber of an aero-engine. In order to investigate the effect of the probe geometry of a six-point gas sampling probe on sampling accuracy in supersonic gas flow, a three-dimensional probe gas flow characteristic solution model is established through numerical simulation methods of components of transport and fluid–solid coupling. Probes with three angles of 28°, 30°, and 32° and an optimized conical probe are constructed. The sampling accuracy of the probes with different geometries is compared and evaluated by the deviation of the component volume fraction before and after sampling and the resulting combustion efficiency error. This paper presents a set of calculation methods for solving the relative deviation of volume fraction by an iterative method based on the ideal gas law and the Redlich–Kwong equation (R-K equation). The method is designed to solve the exact component volume fraction problem in the simulation calculation. The study results demonstrate that the 28° and optimized conical probes improve sampling accuracy more effectively than the original 30° structure. The deviation of the volume fractions of the two structures is less than 1.7%, and the combustion efficiency error is less than 0.09%. The developed iterative calculation method can significantly reduce the theoretical calculation error to less than 0.06%. The experimental data of the test bench are in good agreement with the simulation results, thereby demonstrating the reliability and accuracy of the sampling probe following structural optimization.
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来源期刊
ACS Applied Bio Materials
ACS Applied Bio Materials Chemistry-Chemistry (all)
CiteScore
9.40
自引率
2.10%
发文量
464
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