| Citation: | ZOU Yun, XU Baolong, WAN Bin, et al. Contrastive study on cool flow resistance characteristics between single-channel and three-channel diffuser[J]. Journal of Aerospace Power, 2024, 39（2）：20210471 doi: 10.13224/j.cnki.jasp.20210471
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In order to provide technical support for the selection of diffuser of high-temperature rise combustor, with a high-temperature rise full annular test piece taken as the test platform, the total pressure loss characteristics varying with the combustor import Mach number of the single-channel and three-channel diffuser combustors under inlet total pressure 500 kPa and inlet temperature 500 K, and numerical simulation was conducted by means of CFD technology as well. The comparison between the experimental and numerical simulation results showed that: the total pressure loss of diffuser, flame tube, and combustor in the single-channel diffuser combustor was lower than that in the three-channel diffuser combustor, the total pressure loss of diffuser, flame tube and combustor was reduced by 0.13%, 0.02% and 0.16%, separately at the design point; the selected numerical simulation method could be used to evaluate the variation trend of cold flow resistance characteristics of combustor, but it could not accurately evaluate the absolute value of total pressure loss.
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