Temporal Instability for a Charged Power-Law Liquid Jet in a Coaxial Swirling Air

AIAA Journal ◽  
2018 ◽  
Vol 56 (9) ◽  
pp. 3515-3523 ◽  
Author(s):  
Xin-Tao Wang ◽  
Zhi Ning ◽  
Ming Lü
Keyword(s):  
Power Law ◽  
Liquid Jet ◽  
Temporal Instability

DUAL-MODE LINEAR ANALYSIS OF TEMPORAL INSTABILITY FOR POWER-LAW LIQUID SHEET

2016 ◽  
Vol 26 (4) ◽  
pp. 319-347 ◽  
Author(s):  
Han-Yu Deng ◽  
Feng Feng ◽  
Xiao-Song Wu
Keyword(s):  
Power Law ◽  
Linear Analysis ◽  
Liquid Sheet ◽  
Dual Mode ◽  
Temporal Instability

scholarly journals Effects of Asymmetric Gas Distribution on the Instability of a Plane Power-Law Liquid Jet

Energies ◽  
2018 ◽  
Vol 11 (7) ◽  
pp. 1854 ◽  
Author(s):  
Jin-Peng Guo ◽  
Yi-Bo Wang ◽  
Fu-Qiang Bai ◽  
Fan Zhang ◽  
Qing Du
Keyword(s):  
Power Law ◽  
Liquid Velocity ◽  
Linear Instability ◽  
Liquid Jets ◽  
Liquid Jet ◽  
Critical Curves ◽  
Jet Breakup ◽  
Plane Jets ◽  
Gas Space ◽  
Aerodynamic Asymmetry

As a kind of non-Newtonian fluid with special rheological features, the study of the breakup of power-law liquid jets has drawn more interest due to its extensive engineering applications. This paper investigated the effect of gas media confinement and asymmetry on the instability of power-law plane jets by linear instability analysis. The gas asymmetric conditions mainly result from unequal gas media thickness and aerodynamic forces on both sides of a liquid jet. The results show a limited gas space will strengthen the interaction between gas and liquid and destabilize the power-law liquid jet. Power-law fluid is easier to disintegrate into droplets in asymmetric gas medium than that in the symmetric case. The aerodynamic asymmetry destabilizes para-sinuous mode, whereas stabilizes para-varicose mode. For a large Weber number, the aerodynamic asymmetry plays a more significant role on jet instability compared with boundary asymmetry. The para-sinuous mode is always responsible for the jet breakup in the asymmetric gas media. With a larger gas density or higher liquid velocity, the aerodynamic asymmetry could dramatically promote liquid disintegration. Finally, the influence of two asymmetry distributions on the unstable range was analyzed and the critical curves were obtained to distinguish unstable regimes and stable regimes.

Instability analysis of a power law liquid jet

2013 ◽  
Vol 198 ◽  
pp. 10-17 ◽  
Author(s):  
Qing Chang ◽  
Meng-zheng Zhang ◽  
Fu-qiang Bai ◽  
Jiang-ping Wu ◽  
Zhen-yan Xia ◽  
...  
Keyword(s):  
Power Law ◽  
Liquid Jet ◽  
Instability Analysis

INFLUENCES OF BOUNDED AND COMPRESSIBLE GAS MEDIUM ON THE INSTABILITY OF AN ANNULAR POWER-LAW LIQUID JET

2018 ◽  
Vol 28 (5) ◽  
pp. 389-402 ◽  
Author(s):  
Yi-bo Wang ◽  
Jin-Peng Guo ◽  
Fu-Qiang Bai ◽  
Qing Du
Keyword(s):  
Power Law ◽  
Liquid Jet ◽  
Gas Medium ◽  
Compressible Gas

Temporal Instability of a Power-Law Planar Liquid Sheet

2015 ◽  
Vol 31 (1) ◽  
pp. 286-293 ◽  
Author(s):  
Li-jun Yang ◽  
Ming-long Du ◽  
Qing-fei Fu ◽  
Ming-xi Tong ◽  
Chen Wang
Keyword(s):  
Power Law ◽  
Liquid Sheet ◽  
Temporal Instability

Temporal analysis of breakup for a power law liquid jet in a swirling gas

Meccanica ◽  
2017 ◽  
Vol 53 (8) ◽  
pp. 2067-2078 ◽  
Author(s):  
Xin-Tao Wang ◽  
Zhi Ning ◽  
Ming Lü ◽  
Chun-Hua Sun
Keyword(s):  
Power Law ◽  
Temporal Analysis ◽  
Liquid Jet

LINEAR STABILITY ANALYSIS OF A POWER-LAW LIQUID JET

2012 ◽  
Vol 22 (2) ◽  
pp. 123-141 ◽  
Author(s):  
Li-Jun Yang ◽  
Ming-long Du ◽  
Qing-Fei Fu ◽  
Wei Zhang
Keyword(s):  
Stability Analysis ◽  
Linear Stability ◽  
Power Law ◽  
Linear Stability Analysis ◽  
Liquid Jet

Liquid jet primary breakup in a turbulent cross-airflow at low Weber number

2019 ◽  
Vol 879 ◽  
pp. 775-792 ◽  
Author(s):  
M. Broumand ◽  
M. Birouk ◽  
S. Vahid Mahmoodi J.
Keyword(s):  
Power Law ◽  
Turbulence Intensity ◽  
Weber Number ◽  
Travelling Waves ◽  
Perforated Plate ◽  
Liquid Jet ◽  
Mean Velocity ◽  
Jet Breakup ◽  
Jet Trajectory ◽  
Primary Breakup

The influence of turbulence characteristics of a cross-airflow including its velocity fluctuations and integral length and time scales on the primary breakup regime, trajectory and breakup height and time of a transversely injected liquid jet was investigated experimentally. Turbulence intensity of the incoming airflow was varied from $u_{rms}/u_{g}=1.5\,\%$ to 5.5 % (where $u_{g}$ is cross-airflow streamwise mean velocity and $u_{rms}$ is the r.m.s. of the corresponding cross-airflow streamwise mean velocity fluctuation) by placing at the inlet of the test section a perforated plate/grid with a solidity ratio of $S=50\,\%$. Over the range of gas Weber number, $3.1<We_{g}<7.14$, the ensuing liquid jet exhibited more fluctuations and late breakup transitional behaviour under turbulent airflow conditions than in a uniform cross-airflow. Proper orthogonal decomposition of the liquid jet dynamics revealed that the use of grid caused a rise in the wavelength of travelling waves along the liquid jet, which hindered the transition of the liquid jet primary breakup regime from enhanced capillary breakup to the bag breakup mode. The quantitative results demonstrated that, at a constant airflow mean velocity, turbulent cross-airflow caused the liquid jet to bend earlier compared with its uniform counterpart. A power-law empirical correlation was proposed for the prediction of the liquid jet trajectory which takes into account the effect of turbulent Reynolds number. The liquid jet breakup height (in the $y$-axis direction) normalized by the jet diameter, and accordingly the liquid jet breakup time normalized by the airflow integral time scale, were found to decrease with increasing the airflow turbulence intensity. Two power-law empirical correlations were proposed to predict the liquid jet breakup height and time.

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