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The use of a compliant surface for s...

Fletcher, Alex Julian P.

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The use of a compliant surface for supersonic flow over a compression ramp.

Record Type:	Electronic resources : Monograph/item
Title/Author:	The use of a compliant surface for supersonic flow over a compression ramp./
Author:	Fletcher, Alex Julian P.
Description:	212 p.
Notes:	Source: Dissertation Abstracts International, Volume: 63-12, Section: B, page: 6051.
Contained By:	Dissertation Abstracts International63-12B.
Subject:	Engineering, Mechanical. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3073973
ISBN:	0493937439

The use of a compliant surface for supersonic flow over a compression ramp.
Fletcher, Alex Julian P.

The use of a compliant surface for supersonic flow over a compression ramp. - 212 p.

Source: Dissertation Abstracts International, Volume: 63-12, Section: B, page: 6051.

Thesis (Ph.D.)--Lehigh University, 2003.

Supersonic boundary layer flow over a compression ramp is considered in the limit of large Reynolds numbers and for Mach numbers O(1), using the asymptotic theory of viscous-inviscid interactions. Reversed flow is known to occur near the ramp corner once the ramp angle is sufficiently large. At a second, larger ramp angle the flow is shown to exhibit an absolute instability which is believed to be a precursor of transition to turbulence. The properties of this instability, as well as a convective instability that precedes it are elucidated. Both types of instabilities are associated solely with the back-flow region. It is also shown that a compliant surface can, under certain circumstances control or delay the evolution of these instabilities. A compliant surface can also be subject to Tollmien-Schlichting instabilities and these are also investigated for supersonic flow over a flat, flexible surface. The effect of the material properties of the surface are considered in isolation and in combination, and neutral curves of stability are obtained. For a simple elastic surface, where deflections are proportional to the local pressure difference, the flow remains stable as for a rigid wall. A combined surface, where damping and inertial effects are significant exhibits complicated stability characteristics which are documented here in detail.

ISBN: 0493937439Subjects--Topical Terms:

783786
Engineering, Mechanical.

The use of a compliant surface for supersonic flow over a compression ramp.
LDR:02240nmm 2200277 4500 001 1851808
005 20051215075917.5
008 130614s2003 eng d
020 $a 0493937439
035 $a (UnM)AAI3073973
035 $a AAI3073973
040 $a UnM $c UnM
100 1 $a Fletcher, Alex Julian P. $3 1939689
245 1 4 $a The use of a compliant surface for supersonic flow over a compression ramp.
300 $a 212 p.
500 $a Source: Dissertation Abstracts International, Volume: 63-12, Section: B, page: 6051.
500 $a Adviser: J. D. A. Walker.
502 $a Thesis (Ph.D.)--Lehigh University, 2003.
520 $a Supersonic boundary layer flow over a compression ramp is considered in the limit of large Reynolds numbers and for Mach numbers O(1), using the asymptotic theory of viscous-inviscid interactions. Reversed flow is known to occur near the ramp corner once the ramp angle is sufficiently large. At a second, larger ramp angle the flow is shown to exhibit an absolute instability which is believed to be a precursor of transition to turbulence. The properties of this instability, as well as a convective instability that precedes it are elucidated. Both types of instabilities are associated solely with the back-flow region. It is also shown that a compliant surface can, under certain circumstances control or delay the evolution of these instabilities. A compliant surface can also be subject to Tollmien-Schlichting instabilities and these are also investigated for supersonic flow over a flat, flexible surface. The effect of the material properties of the surface are considered in isolation and in combination, and neutral curves of stability are obtained. For a simple elastic surface, where deflections are proportional to the local pressure difference, the flow remains stable as for a rigid wall. A combined surface, where damping and inertial effects are significant exhibits complicated stability characteristics which are documented here in detail.
590 $a School code: 0105.
650 4 $a Engineering, Mechanical. $3 783786
650 4 $a Applied Mechanics. $3 1018410
690 $a 0548
690 $a 0346
710 2 0 $a Lehigh University. $3 515436
773 0 $t Dissertation Abstracts International $g 63-12B.
790 1 0 $a Walker, J. D. A., $e advisor
790 $a 0105
791 $a Ph.D.
792 $a 2003
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3073973