Instability of accelerated boundary layers induced by surface suction

P. J D Roberts; J. M. Floryan

doi:10.2514/2.1751

Instability of accelerated boundary layers induced by surface suction

P. J D Roberts, J. M. Floryan

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

4 Citations (Scopus)

Abstract

Accelerated boundary layers are considered to be stable for practical purposes. It is shown that small suction nonuniformities can induce an instability that results in the generation of streamwise vortices. Addition of a uniform suction is not effective in controlling this instability. It is shown that nonuniformities of surface blowing might induce a similar instability and that the characteristics of this instability are also little affected by the magnitude of the blowing. The same nonuniformities appear to have a small effect on the traveling (Tollmien-Schlichting) wave instability in the range of parameters studied. It is shown that oblique waves become dominant if the amplitudes of the nonuniformities become large enough.

Original language	English
Pages (from-to)	851-859
Journal	AIAA Journal
Volume	40
Issue number	5
DOIs	https://doi.org/10.2514/2.1751
Publication status	Published - May 2002
Externally published	Yes

Bibliographical note

Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

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abstract = "Accelerated boundary layers are considered to be stable for practical purposes. It is shown that small suction nonuniformities can induce an instability that results in the generation of streamwise vortices. Addition of a uniform suction is not effective in controlling this instability. It is shown that nonuniformities of surface blowing might induce a similar instability and that the characteristics of this instability are also little affected by the magnitude of the blowing. The same nonuniformities appear to have a small effect on the traveling (Tollmien-Schlichting) wave instability in the range of parameters studied. It is shown that oblique waves become dominant if the amplitudes of the nonuniformities become large enough.",

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N2 - Accelerated boundary layers are considered to be stable for practical purposes. It is shown that small suction nonuniformities can induce an instability that results in the generation of streamwise vortices. Addition of a uniform suction is not effective in controlling this instability. It is shown that nonuniformities of surface blowing might induce a similar instability and that the characteristics of this instability are also little affected by the magnitude of the blowing. The same nonuniformities appear to have a small effect on the traveling (Tollmien-Schlichting) wave instability in the range of parameters studied. It is shown that oblique waves become dominant if the amplitudes of the nonuniformities become large enough.

AB - Accelerated boundary layers are considered to be stable for practical purposes. It is shown that small suction nonuniformities can induce an instability that results in the generation of streamwise vortices. Addition of a uniform suction is not effective in controlling this instability. It is shown that nonuniformities of surface blowing might induce a similar instability and that the characteristics of this instability are also little affected by the magnitude of the blowing. The same nonuniformities appear to have a small effect on the traveling (Tollmien-Schlichting) wave instability in the range of parameters studied. It is shown that oblique waves become dominant if the amplitudes of the nonuniformities become large enough.

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Instability of accelerated boundary layers induced by surface suction

Abstract

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