| SHEN Guwang,JIN Zhiguang,ZHOU Hang.Design and Experimental Study of an Integrated Subsonic S-shaped Inlet[J].航空发动机,2026,52(1):138-144 |
| Design and Experimental Study of an Integrated Subsonic S-shaped Inlet |
| DOI：10.12482/ISSN.1672-3147.20241017002 |
| Key Words:s-shaped inlet subsonic inlet numerical simulation matching test integrated design aeroengine |
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| Abstract:To validate the flow field control effect of the "∧"-shaped bulge in an S-bend intake duct, an integrated design and
experimental study of a subsonic S-bend intake duct was conducted. The preliminary design phase included defining the centerline profile
and area variation rate along the inner surface of the duct. A "∧"-shaped bulge was incorporated into the intermediate section of the duct to
achieve aerodynamic integration between the intake and the airframe. Numerical simulations and matching tests were performed to
analyzed both wide-range operating characteristics and system compatibility. Simulation results indicate that under design conditions, the
"∧"-shaped protrusion effectively displaces the boundary layer upstream of the intake entrance. The total pressure recovery coefficient of
the intake exceeds 0.98. Over a wide operating range, the total pressure recovery remains above 0.91, while the exit distortion index are
maintained below 0.551 for DC60 and under 5.44% for W. Experimental measurements show that the total pressure recovery at the duct
outlet exceeds 0.92. The engine experiences an overall average thrust loss of 3.14%, along with a 1.08% increase in average fuel consump?
tion rate. Collectively, these results demonstrate that the intake exhibits favorable comprehensive performance, with a high level of flow
matching and aerodynamic compatibility relative to engine requirements. |
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