Shear Layer Dynamics in a Reacting Jet in Crossflow
Shear Layer Dynamics in a Reacting Jet in Crossflow
复制标题
横流反应射流中的剪切层动力学
DOI:
10.1016/j.proci.2018.06.031
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发表时间:
2019
影响因子:
3.4
通讯作者:
Lieuwen, Tim
中科院分区:
文献类型:
--
作者:
Nair, Vedanth;Wilde, Benjamin;Emerson, Benjamin;Lieuwen, Tim
This study explores the effect of heat release on the growth of the shear layer vortical structures in a reacting jet in crossflow. Jets composed of mixtures of hydrogen, helium and nitrogen were used to independently vary the momentum flux ratio (J), jet to crossflow density ratio (S) and heat release. Velocity fields were obtained from 10 kHz high-speed stereoscopic particle image velocimetry (SPIV) and regions of elevated temperature/combustion products from simultaneous OH planar laser induced fluorescence (OH-PLIF). The shear layer vortices (SLV) originating from instabilities in the windward and leeward shear layers were identified using vortex identification indicator functions in order to track their spatial location and strength. The results show that the asymmetries in shear layer strength between the windward and leeward shear layers are dependent primarily onJ, for both reacting and non-reacting flow-fields. The SLV growth rate dependencies onJandSis found to match trends noted by previous studies for non-reacting jets, where SLV growth rates increase with degree of global instability of the JICF. Heat release is also shown to suppress the SLV growth rates relative to non-reacting cases with the same jet parameters. Related to this point, the degree of lifting of the flame also has a significant impact on SLV growth. As flame lifting is directly related to autoignition times, this point shows strong coupling between kinetic rates and jet hydrodynamic stability.
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影响因子:
3.7
作者:
B. Emerson;T. Lieuwen
通讯作者:
T. Lieuwen
DOI:
--
发表时间:
2013
期刊:
影响因子:
--
作者:
T. Demayo;M. Leong;G. Samuelsen;J. Holdeman
通讯作者:
J. Holdeman
DOI:
--
发表时间:
2013
期刊:
影响因子:
--
作者:
A. Steinberg;R. Sadanandan;C. Dem;P. Kutne;W. Meier
通讯作者:
W. Meier
DOI:
10.2140/camcos.2016.11.37
发表时间:
2016
期刊:
012 IEEE 28th Symposium on Mass Storage Systems and Technologies (MSST)
影响因子:
--
作者:
P. Bremer;A. Gruber;Janine Bennett;A. Gyulassy;H. Kolla;Jacqueline H. Chen;R. Grout
通讯作者:
R. Grout
DOI:
--
发表时间:
2016
期刊:
影响因子:
--
作者:
T.Nakashima;T.Shiratori;Y.Murai;Y.Tasaka;Y.Takeda;E.J.Windhab;大友衆示,村井祐一,田坂裕司,Petr Denissenko;磯田 龍,大須賀 侑,小林寛尭,田坂裕司,村井祐一
通讯作者:
磯田 龍,大須賀 侑,小林寛尭,田坂裕司,村井祐一