Spectral analysis of self-sustained oscillations for the free jet under variable outlet conditions

被引:0
作者
Pawlowska, A. [1 ]
Drobniak, S. [1 ]
Domagala, P. [1 ]
机构
[1] Czestochowa Tech Univ, Fac Mech Engn & Comp Sci, Inst Thermal Machinery, Al Armii Krajowej 21, PL-42200 Czestochowa, Poland
来源
XXII FLUID MECHANICS CONFERENCE (KKMP2016) | 2016年 / 760卷
关键词
ABSOLUTE;
D O I
10.1088/1742-6596/760/1/012021
中图分类号
O3 [力学];
学科分类号
08 ; 0801 ;
摘要
The paper presents results of research devoted to the experimental verification of the new regime of self-sustained oscillations in the free axisymmetric jet, which was found numerically at the institute of Thermal Machinery. Self-sustained oscillations may only appear when two conditions are fulfilled: the exit shear layer should be sufficiently thin and the level of turbulence intensity at the nozzle exit should be sufficiently low. The hot-wire measurements were performed for wide range of exit shear layer thickness and level of initial turbulence intensity, which allowed to formulate the preliminary conclusions regarding the conditions required for the appearance of the new phenomenon and its sacling as well as to verify the results of numerical modelling.
引用
收藏
页数:8
相关论文
共 16 条
[1]   Self-sustained oscillations in a homogeneous-density round jet [J].
Boguslawski, A. ;
Tyliszczak, A. ;
Drobniak, S. ;
Asendrych, D. .
JOURNAL OF TURBULENCE, 2013, 14 (04) :25-52
[2]  
Boguslawski A, 2002, SERIA MONOGRAFIE, V85
[3]   DENSITY EFFECTS AND LARGE STRUCTURE IN TURBULENT MIXING LAYERS [J].
BROWN, GL ;
ROSHKO, A .
JOURNAL OF FLUID MECHANICS, 1974, 64 (JUL24) :775-&
[4]   ORDERLY STRUCTURE IN JET TURBULENCE [J].
CROW, SC ;
CHAMPAGNE, FH .
JOURNAL OF FLUID MECHANICS, 1971, 48 (AUG16) :547-+
[5]   Experimental analysis of internal energy transport in the presence of coherent motion [J].
Drobniak, S ;
Elsner, JW ;
AbouElKassem, ES .
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 1998, 41 (03) :635-643
[6]   The relationship between coherent structures and heat transfer processes in the initial region of a round jet [J].
Drobniak, S ;
Elsner, JW ;
El-Kassem, ESA .
EXPERIMENTS IN FLUIDS, 1998, 24 (03) :225-237
[7]  
Fiedler H. E., 1988, PROG AEROSP SCI, V173, P303
[8]   ABSOLUTE AND CONVECTIVE INSTABILITIES IN FREE SHEAR LAYERS [J].
HUERRE, P ;
MONKEWITZ, PA .
JOURNAL OF FLUID MECHANICS, 1985, 159 (OCT) :151-168
[9]  
Hussain A. K. M. F., 1986, J FLUID MECH, V44, P1349
[10]   THE INSTABILITY AND BREAKDOWN OF A ROUND VARIABLE-DENSITY JET [J].
KYLE, DM ;
SREENIVASAN, KR .
JOURNAL OF FLUID MECHANICS, 1993, 249 :619-664