SOME PRELIMINARY OBSERVATIONS ON TRANSITION IN A PIPE

I WYGNANSKI I

SOME PRELIMINARY OBSERVATIONS ON TRANSITION IN A PIPE

Research output: Contribution to conference › Paper › peer-review

Abstract

Conventional and conditionally sampled hot-wire measurements were taken in a pipe at Reynolds numbers corresponding to the onset of turbulence. The laminar velocity profile is distorted in an axisymmetric fashion with increasing Re. At Re more than 4000 the increase of Re has no significant effect on the shape of the laminar velocity profile even when turbulent slugs appear. Some gross characteristics of turbulent slugs were examined. It was found that a typical slug is symmetical (the shape of the leading edge is the same as the trailing edge) provided that it originates in the pipe and it is not triggered by an obstacle at the inlet.

Original language	English (US)
State	Published - 1970
Externally published	Yes
Event	Technion, Dep Aeronaut Eng - Haifa, Isr Duration: Apr 1 1970 → Apr 1 1970

Conference

Conference	Technion, Dep Aeronaut Eng
City	Haifa, Isr
Period	4/1/70 → 4/1/70

ASJC Scopus subject areas

General Engineering

Cite this

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title = "SOME PRELIMINARY OBSERVATIONS ON TRANSITION IN A PIPE",

abstract = "Conventional and conditionally sampled hot-wire measurements were taken in a pipe at Reynolds numbers corresponding to the onset of turbulence. The laminar velocity profile is distorted in an axisymmetric fashion with increasing Re. At Re more than 4000 the increase of Re has no significant effect on the shape of the laminar velocity profile even when turbulent slugs appear. Some gross characteristics of turbulent slugs were examined. It was found that a typical slug is symmetical (the shape of the leading edge is the same as the trailing edge) provided that it originates in the pipe and it is not triggered by an obstacle at the inlet.",

author = "{WYGNANSKI I}, I",

year = "1970",

language = "English (US)",

note = "Technion, Dep Aeronaut Eng ; Conference date: 01-04-1970 Through 01-04-1970",

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PY - 1970

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N2 - Conventional and conditionally sampled hot-wire measurements were taken in a pipe at Reynolds numbers corresponding to the onset of turbulence. The laminar velocity profile is distorted in an axisymmetric fashion with increasing Re. At Re more than 4000 the increase of Re has no significant effect on the shape of the laminar velocity profile even when turbulent slugs appear. Some gross characteristics of turbulent slugs were examined. It was found that a typical slug is symmetical (the shape of the leading edge is the same as the trailing edge) provided that it originates in the pipe and it is not triggered by an obstacle at the inlet.

AB - Conventional and conditionally sampled hot-wire measurements were taken in a pipe at Reynolds numbers corresponding to the onset of turbulence. The laminar velocity profile is distorted in an axisymmetric fashion with increasing Re. At Re more than 4000 the increase of Re has no significant effect on the shape of the laminar velocity profile even when turbulent slugs appear. Some gross characteristics of turbulent slugs were examined. It was found that a typical slug is symmetical (the shape of the leading edge is the same as the trailing edge) provided that it originates in the pipe and it is not triggered by an obstacle at the inlet.

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T2 - Technion, Dep Aeronaut Eng

Y2 - 1 April 1970 through 1 April 1970

ER -

SOME PRELIMINARY OBSERVATIONS ON TRANSITION IN A PIPE

Abstract

Conference

ASJC Scopus subject areas

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