【摘 要】
：
To investigate the influence of real leading-edge manufacturing error on aerodynamic performance of high subsonic compressor blades,a family of leading-edge man
【机 构】
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School of Power and Energy,Northwestern Polytechnical University,Xi’an 710129,China;The National Key
论文部分内容阅读
To investigate the influence of real leading-edge manufacturing error on aerodynamic performance of high subsonic compressor blades,a family of leading-edge manufacturing error data were obtained from measured compressor cascades.Considering the limited samples,the leading-edge angle and leading-edge radius distribution forms were evaluated by Shapiro-Wilk test and quantile-quantile plot.Their statistical characteristics provided can be introduced to later related researches.The parameterization design method B-spline and Bezier are adopted to create geometry models with manufacturing error based on leading-edge angle and leading-edge radius.The influ-ence of real manufacturing error is quantified and analyzed by self-developed non-intrusive polyno-mial chaos and Sobol\'indices.The mechanism of leading-edge manufacturing error on aerodynamic performance is discussed.The results show that the total pressure loss coefficient is sensitive to the leading-edge manufacturing error compared with the static pressure ratio,especially at high incidence.Specifically,manufacturing error of the leading edge will influence the local flow acceleration and subsequently cause fluctuation of the downstream flow.The aerodynamic perfor-mance is sensitive to the manufacturing error of leading-edge radius at the design and negative inci-dences,while it is sensitive to the manufacturing error of leading-edge angle under the operation conditions with high incidences.
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