CFD simulation of a vortex-controlled diffuser for a jet engine burner

• Autorzy: Chijioke, Emeka Gaius , Teodorczyk, Andrzej
• Języki publikacji: EN

Abstrakty

EN

A computational flow analysis of an ideal vortex-controlled diffuser (VCD) was carried out. The simulation model used is the compressible Reynolds averaged Navier-Stokes equations(RANS), with the application of the RNG based k-ε turbulence model. The effects of important parameters like static pressure recovery, bleed fraction, position of bleed slot, have been studied and comparisons were made with respect to VCD without the bleed configuration and the following features were revealed: radial profiles of velocity at inlet, mid-planes and exit planes, including diffuser effectiveness (i.e. static pressure recovery), diffuser efficiency, reattachment length and diffuser total pressure loss. Results obtained by applying the RNG turbulence model show an instantaneous improvement in the diffuser efficiency that happen at reasonably minimal suction rates. From the calculations, it has been verified and shown in the analysis that the effect of the bleed positioning offers advantages in relation to where it is located.

Słowa kluczowe

PL

dyfuzor wirowy; szczelina upustowa; modelowanie; odzyskiwanie ciśnienia statycznego; długość mocowania

EN

vortex-controlled diffuser; bleed slot; modelling; static pressure recovery; reattachment length

• Czasopismo: Combustion Engines
• Rocznik: 2023
• Tom: R. 62, nr 4
• Strony: 71--82
• Opis fizyczny: Bibliogr. 19 poz., il. kolor., rys., wykr.

Twórcy

autor

Chijioke, Emeka Gaius

• Faculty of Power and Aeronautical Engineering, Warsaw University of Technology, Poland,

autor

Teodorczyk, Andrzej

• Faculty of Power and Aeronautical Engineering, Warsaw University of Technology, Poland,

Bibliografia

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Identyfikatory

DOI

10.19206/CE-171522