摘要:

Data obtained using the Raman/Rayleigh/LIF technique in turbulent nonpremixed reacting flows behind a bluff-body are analyzed to study the behavior of conditionally averaged temperature and species mass fraction. In particular, their cross stream dependence in the elliptic region of the above flow fields is investigated from the conditional moment closure view. Analyses show that the conditional averages have a very weak dependence on the cross stream position in recirculation regions which are elliptic in nature. The weak cross stream dependence of the conditional averages has been established in previous studies for parabolic flows. ©1998 American Institute of Physics.

ISSN:1070-6631    

DOI:10.1063/1.869760

出版商:AIP    

年代:1998

数据来源: AIP

摘要:

Using dye visualization techniques, we have observed vortex structures within the jet region of round transverse jets which, to the best of our knowledge, have not been reported before. These structures confirm the existence of a pair of negative bifurcation lines in the surface flow of the pipe and the conjecture of Abramovich (1963) concerning additional vortical motions within the jet itself. ©1998 American Institute of Physics.

ISSN:1070-6631    

DOI:10.1063/1.869761

出版商:AIP    

年代:1998

数据来源: AIP