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Research Papers

Experimental Analysis and Phenomenological Model for Liquid Jet Breakup in Swirling Flow of Air

[+] Author and Article Information
Tushar Sikroria

Department of Aerospace Engineering,
Indian Institute of Technology Kanpur,
Kanpur, UP 208016, India
e-mail: tsikroria0@gmail.com

Abhijit Kushari

Department of Aerospace Engineering,
Indian Institute of Technology Kanpur,
Kanpur, UP 208016, India
e-mail: akushari@iitk.ac.in

Manuscript received September 26, 2018; final manuscript received June 13, 2019; published online July 12, 2019. Assoc. Editor: Michael Mueller.

J. Eng. Gas Turbines Power 141(9), 091015 (Jul 12, 2019) (12 pages) Paper No: GTP-18-1627; doi: 10.1115/1.4044060 History: Received September 26, 2018; Revised June 13, 2019

This paper presents detailed analysis of an experimental investigation of the impact of swirl number of subsonic cross-flowing air stream on liquid jet breakup at an airflow Mach number of 0.12, which is typical in gas turbine conditions. Experiments are performed for four different swirl numbers (0, 0.2, 0.42, and 0.73) using swirl vanes at air inlet having angles of 0 deg, 15 deg, 30 deg, and 45 deg, respectively. Liquid to air momentum flux ratios (q) have been varied from 1 to 25. High-speed images of the interaction of liquid and air streams are captured and processed to estimate the jet penetration height as well as the breakup location for various flow conditions. The results show unique behavior for each swirl number, which departs from the straight flow correlations available in the literature. Based on the results, an attempt has been made to understand the physics of the phenomena and come up with a simplified physical model for prediction of jet penetration. Furthermore, the high-speed images show a dominant influence of liquid column fluttering on fracture mechanism (column or shear breakup mechanism).

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References

Dahm, W. J. A. , Patel, P. R. , and Lerg, B. H. , 2002, “ Visualization and Fundamental Analysis of Liquid Atomization by Fuel Slingers in Small Gas Turbine Engines,” AIAA Paper No. 2002–3183.
Lee, D. , You, G. , Choi, S. , and Huh, H. , 2011, “ Analysis of Formation and Breakup Mechanisms in Rotary Atomization Through Spray Visualization,” J. Visualization, 14(3), pp. 273–283. [CrossRef]
Chelko, L. J. , 1950, “ Penetration of Liquid Jets Into a High Velocity Air Stream,” NACA, Washington, DC, Report No. RM E50F21.
Ingebo, R. D. , and Foster, H. H. , 1957, “ Drop Size Distribution for Cross Current Breakup of Liquid Jets in Air Streams,” NACA, Cleveland, Ohio, Report No. TN 4087.
Wu, P.-K. , Kirkendall, K. A. , Fuller, R. P. , and Nejad, A. S. , 1997, “ Breakup Processes of Liquid Jet in Subsonic Cross Flows,” J. Propul. Power, 13(1), p. 64. [CrossRef]
Wu, P. K. , Kirkendall, K. A. , Nejad, A. S. , and Fuller, R. P. , 1998, “ Spray Structures of Liquid Jets Atomized in Subsonic Cross Flows,” J. Propul. Power, 14(2), pp. 173–182. [CrossRef]
Ranger, A. A. , and Nicholls, J. A. , 1968, “ The Aerodynamic Shattering of Liquid Drops,” AIAA Paper No. 68-83.
Tambe, S. B. , Jeng, S. M. , Mongia, H. , and Hsaio, G. , 2005, “ Liquid Jets in Subsonic Cross Flows,” 43rd AIAA Aerospace Sciences Meeting and Exhibit, pp. 10–13.
Aalburg, C. , Faeth, G. M. , and Sallam, K. A. , 2004, “ Breakup of Round Non-Turbulent Liquid Jets in Gaseous Cross Flows,” AIAA Paper No.12.
Aalburg, C. , van Leer, B. , Faeth, G. M. , and Sallam, K. A. , 2005, “ Properties of Non-Turbulent Round Liquid Jets in Uniform Gaseous Cross Flows,” Atomization Sprays, 15(3), pp. 271–294. [CrossRef]
Ng, C. L. , Sankarakrishnan, R. , and Sallam, K. A. , 2008, “ Bag Breakup of Non-Turbulent Liquid Jets in Cross Flow,” J. Multiphase Flow, 34(3), pp. 241–259. [CrossRef]
Mazallon, J. , Dai, Z. , and Faeth, G. M. , 1999, “ Primary Breakup of Non-Turbulent Round Liquid Jets in Gas Cross Flows,” Atomization Sprays, 9(3), pp. 291–312. [CrossRef]
Birouk, M. , Azzopardi, B. , and Stabler, T. , 2003, “ Primary Breakup of a Viscous Liquid Jet in a Cross Airflow,” Part. Part. Syst. Charact., 20(4), pp. 283–289. [CrossRef]
Becker, J. , and Hassa, C. , 2002, “ Breakup and Atomization of a Kerosene Jet in Cross ow at Elevated Pressure,” Atomization Sprays, 12(1–3), pp. 49–67. [CrossRef]
Ryan, M. J. , 2006, “ CFD Prediction of the Trajectory of a Liquid Jet in a Non-Uniform Air Crossflow,” Comput. Fluids, 35(5), pp. 463–476. [CrossRef]
Pai, M. G. , Pitsh, H. , and Desjardins, O. , 2009, “ Detailed Numerical Simulations of Primary Atomization Liquid Jets in Cross Flow,” AIAA Paper No. 2009–373.
Yadav, N. P. , and Kushari, A. , 2010, “ Effect of Swirl on the Turbulent Behavior of a Dump Combustor Flow,” Proc. Inst. Mech. Eng., Part G, 224, pp. 705–717. [CrossRef]
Ahmed, S. A. , 1998, “ Velocity Measurements and Turbulence Statistics of a Confined Isothermal Swirling Flow,” Exp. Therm. Fluid Sci., 42, pp. 256–264. [CrossRef]
Grundmann, S. , Jung, B. , Tropea, C. , Wassermann, F. , and Lorenz, R. , 2012, “ Experimental Investigation of Helical Structures in Swirling Flows,” J. Heat Fluid Flow, 37, pp. 51–63. [CrossRef]
Tambe, S. B. , 2010, “ Liquid Jets Injected Into Non-Uniform Crossflow,” Ph.D. thesis, University of Cincinnati, Cincinnati, OH.
Sikroria, T. , Kushari, A. , Syed, S. , and Lovett, J. A. , 2014, “ Experimental Investigation of Liquid Jet Breakup in a Cross Flow of a Swirling Air Stream,” ASME J. Eng. Gas Turbines Power, 136(6), p. 061501. [CrossRef]
Wang, Q. , Mondragon, U. M. , Brown, C. T. , and McDonell, V. G. , 2011, “ Characterization of Trajectory, Beak Point, and Break Point Dynamics of a Plain Liquid Jet in a Crossflow,” Atomization Sprays, 21(3), pp. 203–219. [CrossRef]

Figures

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Fig. 1

Typical swirl vane geometry

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Fig. 2

(a) Schematic of the experimental setup [21] and (b) geometry of the field of study

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Fig. 3

Camera positions for vanes

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Fig. 4

Velocity vectors for the airflow in breakup planes for different swirlers

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Fig. 5

Flow regimes in a swirling flow

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Fig. 6

Radial variation of pressure gradient for different swirlers

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Fig. 7

Approximation of the velocity profile for swirling flows

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Fig. 8

Approximate trends of measured pressure gradients for different swirlers

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Fig. 9

Velocity profile approximations for different swirlers

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Fig. 10

Variation of the Penetration height with momentum flux ratio (q) for different swirl numbers

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Fig. 11

Penetration height with error bars (showing temporal fluctuation) for different swirl numbers (S) at some particular values of momentum flux ratio (q)

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Fig. 12

A representation of breakup process

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Fig. 13

Local Weber number variation along the radial direction for different swirlers

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Fig. 14

Spray outline trace for 45 deg swirl vane (S = 0.73) at q = 25, showing both surface as well as column breakup mode (mixed mode)

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Fig. 15

Penetration height predictions by developed correlations for different swirl numbers

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Fig. 16

Penetration height predictions by correlations developed

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Fig. 17

Penetration length variation with momentum flux ratio for different swirlers

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Fig. 18

Straight jet and wave dominance regimes at q = 8 for (a) S = 0 (0 deg) and (b) S = 0.2 (15 deg)

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Fig. 19

Instantaneous breakup locations for q = 17 and S = 0

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Fig. 20

Standard deviation for all test conditions in (a) penetration length and (b) penetration height

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