Controlled perturbation of circular jets.

A. K.M.F. Hussain; K. B.M.Q. Zaman

doi:10.1007/3-540-08765-6_3

Controlled perturbation of circular jets.

A. K.M.F. Hussain, K. B.M.Q. Zaman

Mechanical Engineering

Research output: Chapter in Book/Report/Conference proceeding › Chapter › peer-review

8 Scopus citations

Abstract

The near flow fields of periodically perturbed circular air jets have been experimentally investigated for the Strouhalnumber range 0 StSUPD 4.0 and the Reynoldsnumber range 11,000-113,000. The larges total fluctuation intensity growth on the centre line occurs at StSUPD 0.85 while the largest fundamental amplitude growth occurs at StSUPD 0.30. At StSUPD 0.85, most of the fluctuations is at the subharmonic frequency associated with vortex, pairing in the 'jet mode', which is independent of the 'shear layer mode' of vortex pairing occurring at StSUPPHI 0.011. Smoke visualization at lower speeds provided further details of pairing in either mode. In the jet mode of vortex pairing, the Reynoldsstress undergoes large excursions even though its time average values are not altered appreciably by the eXcitation. (A)

Original language	English
Title of host publication	IN
Subtitle of host publication	STRUCTURE AND MECHANISMS OF TURBULENCE, (PROC. SYMP. ON TURBULENCE, BERLIN, FED. REP. GERMANY, AUG.1-5, 1977)
Publisher	Springer-Verlag
Pages	31-42
Number of pages	12
Volume	1 , H. Fiedler (Ed.), Berlin, Fed. Rep. Germany, Springer-Verlag, 1978
ISBN (Print)	0540087656
DOIs	https://doi.org/10.1007/3-540-08765-6_3
State	Published - 1978

Access to Document

10.1007/3-540-08765-6_3

Cite this

@inbook{ab478fdc05d743c2abea4f4e5570aa6d,

title = "Controlled perturbation of circular jets.",

abstract = "The near flow fields of periodically perturbed circular air jets have been experimentally investigated for the Strouhalnumber range 0 StSUPD 4.0 and the Reynoldsnumber range 11,000-113,000. The larges total fluctuation intensity growth on the centre line occurs at StSUPD 0.85 while the largest fundamental amplitude growth occurs at StSUPD 0.30. At StSUPD 0.85, most of the fluctuations is at the subharmonic frequency associated with vortex, pairing in the 'jet mode', which is independent of the 'shear layer mode' of vortex pairing occurring at StSUPPHI 0.011. Smoke visualization at lower speeds provided further details of pairing in either mode. In the jet mode of vortex pairing, the Reynoldsstress undergoes large excursions even though its time average values are not altered appreciably by the eXcitation. (A)",

author = "Hussain, {A. K.M.F.} and Zaman, {K. B.M.Q.}",

year = "1978",

doi = "10.1007/3-540-08765-6_3",

language = "English",

isbn = "0540087656",

volume = "1 , H. Fiedler (Ed.), Berlin, Fed. Rep. Germany, Springer-Verlag, 1978",

pages = "31--42",

booktitle = "IN",

publisher = "Springer-Verlag",

}

Controlled perturbation of circular jets. / Hussain, A. K.M.F.; Zaman, K. B.M.Q.
IN: STRUCTURE AND MECHANISMS OF TURBULENCE, (PROC. SYMP. ON TURBULENCE, BERLIN, FED. REP. GERMANY, AUG.1-5, 1977). Vol. 1 , H. Fiedler (Ed.), Berlin, Fed. Rep. Germany, Springer-Verlag, 1978 Springer-Verlag, 1978. p. 31-42.

Research output: Chapter in Book/Report/Conference proceeding › Chapter › peer-review

TY - CHAP

T1 - Controlled perturbation of circular jets.

AU - Hussain, A. K.M.F.

AU - Zaman, K. B.M.Q.

PY - 1978

Y1 - 1978

N2 - The near flow fields of periodically perturbed circular air jets have been experimentally investigated for the Strouhalnumber range 0 StSUPD 4.0 and the Reynoldsnumber range 11,000-113,000. The larges total fluctuation intensity growth on the centre line occurs at StSUPD 0.85 while the largest fundamental amplitude growth occurs at StSUPD 0.30. At StSUPD 0.85, most of the fluctuations is at the subharmonic frequency associated with vortex, pairing in the 'jet mode', which is independent of the 'shear layer mode' of vortex pairing occurring at StSUPPHI 0.011. Smoke visualization at lower speeds provided further details of pairing in either mode. In the jet mode of vortex pairing, the Reynoldsstress undergoes large excursions even though its time average values are not altered appreciably by the eXcitation. (A)

AB - The near flow fields of periodically perturbed circular air jets have been experimentally investigated for the Strouhalnumber range 0 StSUPD 4.0 and the Reynoldsnumber range 11,000-113,000. The larges total fluctuation intensity growth on the centre line occurs at StSUPD 0.85 while the largest fundamental amplitude growth occurs at StSUPD 0.30. At StSUPD 0.85, most of the fluctuations is at the subharmonic frequency associated with vortex, pairing in the 'jet mode', which is independent of the 'shear layer mode' of vortex pairing occurring at StSUPPHI 0.011. Smoke visualization at lower speeds provided further details of pairing in either mode. In the jet mode of vortex pairing, the Reynoldsstress undergoes large excursions even though its time average values are not altered appreciably by the eXcitation. (A)

UR - http://www.scopus.com/inward/record.url?scp=0017901662&partnerID=8YFLogxK

U2 - 10.1007/3-540-08765-6_3

DO - 10.1007/3-540-08765-6_3

M3 - Chapter

AN - SCOPUS:0017901662

SN - 0540087656

VL - 1 , H. Fiedler (Ed.), Berlin, Fed. Rep. Germany, Springer-Verlag, 1978

SP - 31

EP - 42

BT - IN

PB - Springer-Verlag

ER -

Controlled perturbation of circular jets.

Abstract

Access to Document

Other files and links

Fingerprint

Cite this