https://doi.org/10.1140/epjp/s13360-021-01959-y
Regular Article
Performance evaluation of a twin air-intake: effects of geometry, Reynolds number and jet momentum coefficient
Motilal Nehru National Institute of Technology Allahabad, 211004, Prayagraj, Uttar Pradesh, India
Received:
2
March
2021
Accepted:
13
September
2021
Published online:
4
October
2021
Flow separation and non-uniformity are the major challenges in the twin air-intakes. Twin air-intake of the single-engine aircraft provides atmospheric air to its aero-engine. The present article demonstrates the effects of single-offset and dual-offset twin air-intake and jet momentum coefficient at various inlet Reynolds numbers using synthetic jets. A finite volume method-based CFD solver was used to carrying out flow simulation in the twin air-intake. The results indicate marginal effects of the Reynolds number on the twin air-intakes having single- and dual-offsets. The additional vertical curvature provided in double-offset of the twin air-intake due to the stealth feature of the aircraft is responsible for the less static pressure recovery as compared to its single-offset counterpart. However, when the slotted synthetic jets are employed, static pressure recovery is enhanced significantly by reducing the massive flow separation. The reduction in total pressure loss is more in the single-offset twin air-intake as compared to the dual-offset one for all Reynolds numbers. It is also noted that as the centerline curvature increases, the ability of synthetic jets to control the distortion coefficient is decreased at the same jet momentum coefficient.
© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2021
