| Citation: | LIU Jianming，HAO Shengchun，WU Hui，et al.Experimental and numerical simulation on aerodynamic performance of large radius change to length ratio intermediate casing［J］.Journal of Aerospace Power，2022，37（7）：1560‑1568. doi: 10.13224/j.cnki.jasp.20210271
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In order to investigate the aerodynamic performance of the intermediate casing and verify the design method，the aerodynamic performance of the intermediate casing was experimented.At the same time，corresponding numerical simulations were carried out by using NUMECA Fine software.To accurately measure the flow through the core of the intermediate casing，a flow measurement device was designed and the accuracy was checked.Results showed the relative deviation of the measurement accuracy was less than 1.5%.Considering the wall static pressure on both sides of the inlet straight section was smaller than in the center area at high inlet Mach number，and some bypass ratios failed to be adjusted to the target inlet Mach numbers，corresponding numerical simulations were carried out and the solutions were proposed.A single hole total pressure probe was used to measure the sector of the core and bypass outlet.The total performance curves and total pressure recovery coefficient radial change curves of the core，the total pressure recovery coefficient cloud images of the core and bypass were gained and compared with the calculated results.Results showed the core total performance curves，the core and bypass total pressure recovery coefficient cloud images of the calculated results were in good agreement with the experimental results.In the design state，the total pressure recovery coefficients of the core and bypass outlet measurement section were 0.9921 and 0.986，respectively，both were higher than the design indices，indicating the intermediate casing had good aerodynamic performance.
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