TITLE:
Aerodynamic Design of the Bleed Slot in a Hypersonic Quiet Nozzle
AUTHORS:
Ruiqu Li, Junmou Shen, Feng Ji
KEYWORDS:
Hypersonic, Quiet Nozzle, Bleed Slot, Boundary Layer
JOURNAL NAME:
Journal of Applied Mathematics and Physics,
Vol.2 No.6,
May
19,
2014
ABSTRACT: The bleed slot is necessary for the
requirement of the hypersonic quiet flow all over the world. The aim of the bleed
slot is to decrease the influence of the disturbances from the contraction of
the quiet nozzle to the boundary layer downstream of the throat, so that the
boundary layer of the nozzle could be maintained as laminar flow. The main
parameters of the bleed slot include the distance from lip to throat (DLT) and
the width of slot (WS). Various values of those parameters will affect the
performance of the slot by changing the suction intensity of the bleed slot.
Two kinds of the bleed slots in the world are compared in this paper and the
aerodynamic design of the bleed slots is optimized based on the Purdue-type
slot. The influences of the various values of those parameters to the flow
field around the throat are analyzed and the optimizing results of DLT and WS
are consistent with those relative data designed for the slot of the
Boeing/AFOSR Ma 6 Quiet Tunnel.