Effect of Exhaust Nozzle Diameter on Internal Flow Field Characteristics in Base Bleed Unit Simulator

Yong Jie Cao; Yong Gang Yu; Rui Ye; Yu Rong Zhang

doi:10.4028/www.scientific.net/AMM.268-270.1128

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 268-270Effect of Exhaust Nozzle Diameter on Internal Flow...

Effect of Exhaust Nozzle Diameter on Internal Flow Field Characteristics in Base Bleed Unit Simulator

Abstract:

For the optimal design of base bleed unit, a 2D-axisymmetric unsteady model was established and the effects of different exhaust nozzle diameters on the internal flow field were studied. Results show that the larger the exhaust nozzle is, the higher the depressurization rate and the mass flux are at the earlier stage of depressurization, and the lower the pressure, the temperature, the density in the base bleed unit and the flow rate at the nozzle outlet are. But at the later stage, the depressurization rate and the mass flux are smaller instead. The radial temperature is generally unchanged in most part far from the burning surface and increases near the burning surface at the earlier stage of depressurization, whereas it is lowest at the axis and rises up quickly along the radial direction at the later stage. The radial density distributes just oppositely.

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Periodical:

Applied Mechanics and Materials (Volumes 268-270)

Pages:

1128-1133

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.268-270.1128

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Online since:

December 2012

Authors:

Yong Jie Cao, Yong Gang Yu, Rui Ye, Yu Rong Zhang

Keywords:

Base Bleed Unit, Composite Base Bleed Charge, Internal Flow Field, Transient Depressurization

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