Scholarlink

<p>The spatial layout of the high-load supersonic booster and intermediate casing critically impacts overall compression system performance, with the axial distance from the splitter lip to the stator and the split ratio being key parameters. In this paper, numerical simulations are conducted to investigate the matching mechanism between the booster and downstream intermediate casing under varying axial distances and split ratios. Results indicate that incorporating an intermediate casing structure enhances booster stability, while adding a branch blade in the bypass duct reduces booster loss and increases peak efficiency by 0.28%. This modification also improves transition duct performance, cutting losses by 25.3%. Shortening the axial distance mitigates the low-energy fluid region at the rotor tip and broadens the stable operating range, but increases stator loss, decreases overall efficiency, and alters duct losses. Varying the split ratio affects booster outlet flow parameters and shockwave structures: increasing the split ratio from 1.35 to 1.6 improves rotor efficiency by 1% and reduces stator separation loss, though transition duct losses rise.</p>

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Mechanism of Spatial Layout Matching between High-Load Booster and Intermediate Casing

  • 期刊论文

  • 发表日期：

    2026年4月14日

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  • Wenhao Su,
  • Shengfeng Zhao,
  • Shiji Zhou,
  • Haoran Wang,
  • Mingyang Wang,
  • Xin’gen Lu

摘要

The spatial layout of the high-load supersonic booster and intermediate casing critically impacts overall compression system performance, with the axial distance from the splitter lip to the stator and the split ratio being key parameters. In this paper, numerical simulations are conducted to investigate the matching mechanism between the booster and downstream intermediate casing under varying axial distances and split ratios. Results indicate that incorporating an intermediate casing structure enhances booster stability, while adding a branch blade in the bypass duct reduces booster loss and increases peak efficiency by 0.28%. This modification also improves transition duct performance, cutting losses by 25.3%. Shortening the axial distance mitigates the low-energy fluid region at the rotor tip and broadens the stable operating range, but increases stator loss, decreases overall efficiency, and alters duct losses. Varying the split ratio affects booster outlet flow parameters and shockwave structures: increasing the split ratio from 1.35 to 1.6 improves rotor efficiency by 1% and reduces stator separation loss, though transition duct losses rise.