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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.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	The use of a compliant surface for supersonic flow over a compression ramp./
作者:	Fletcher, Alex Julian P.
面頁冊數:	212 p.
附註:	Source: Dissertation Abstracts International, Volume: 63-12, Section: B, page: 6051.
Contained By:	Dissertation Abstracts International63-12B.
標題:	Engineering, Mechanical. -
電子資源:	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.
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500 $a Source: Dissertation Abstracts International, Volume: 63-12, Section: B, page: 6051.
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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.
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