Abstract
A passive infrared suppression (IRS) device is an important and integral part of the modern naval/cargo ships, fighter jets, and helicopters to cool down the hot exhaust gas to suppress the infrared (IR) signatures. A modified IRS device has been proposed by putting inward/outward guides. The air entrainment and temperature ratios of the new type IRS device have been investigated by solving transport equations (continuity, momentum, energy, and turbulence) using the finite volume solver in ansys fluent. The Reynolds number (Ren), guide lengths (Lg/Dn), the inclination angle of guides (θg), overlap-height (Hov/Dn), and outlet temperature ratio (Tout/T∞) have been varied in the range of 1.5 × 10–1.5 × 106, 0–0.326, 0–75 deg, −0.326–0.018, and 1.243–2.576, respectively. It has been observed that the dimensional air entrainment increases with the Reynolds number and inlet temperature. The guide length alters the flow inside the IRS device and affects the entrainment ratio. We observed that, at the optimal value of guide length (Lg/Dn = 0.163) and inclination angle (θg = 15 deg), the IRS device entrains the maximum air, and attains a minimum temperature at the outlet. The mass suction and the outlet temperature of two different types of IRS devices have also been compared to choose the best one for the practical engineering application. An empirical correlation equation for air entrainment has been developed using nonlinear regression analysis.
Issue Section:
Research Papers
References
1.
Ashforth-Frost
, S.
, and Jambunathan
, J.
, 1996
, “Effect of Nozzle Geometry and Semi Confinement on the Potential Core of a Turbulent Axisymmetric Free Jet
,” Int. Commun. Heat Mass Transfer
, 23
(2
), pp. 155
–162
. 2.
Kandakure
, M. T.
, Patkar
, V. C.
, and Patwardhan
, A. W.
, 2008
, “Characteristics of Turbulent Confined Jets
,” Chem. Eng. Process.: Process Intens.
, 47
(8
), pp. 1234
–1245
. 3.
Singh
, G.
, Sundararajan
, T.
, and Bhaskaran
, K. A.
, 2003
, “Mixing and Entrainment Characteristics of Circular and Noncircular Confined Jets
,” ASME J. Fluids Eng.
, 125
(5
), pp. 835
–842
. 4.
Birk
, A. M.
, and Davis
, W. R.
, 1989
, “Suppressing the Infrared Signatures of Marine Gas Turbines
,” ASME J. Eng. Gas Turbines Power
, 111
(1
), pp. 123
–129
. 5.
Rao
, G. A.
, and Mahulikar
, S. P.
, 2005
, “Effect of Atmospheric Transmission and Radiance on Aircraft Infrared Signatures
,” J. Aircr.
, 42
(4
), pp. 1046
–1054
. 6.
Rao
, G. A.
, and Mahulikar
, S. P.
, 2002
, “Integrated Review of Stealth Technology and Its Role in Airpower
,” Aeronaut. J.
, 106
(1066
), pp. 629
–641
.7.
Baranwal
, N.
, and Mahulikar
, S. P.
, 2019
, “Review of Infrared Signature Suppression Systems Using Optical Blocking Method
,” Def. Technol.
, 15
(3
), pp. 432
–439
. 8.
Werle
, M.
, Presz
, W.
, and Paterson
, R.
, 1987
, “Flow Structure in a Periodic Axial Vortex Array
,” Proceedings of the 25th Aerospace Sciences Meeting
, Reno, NV
, January 12–15
, AIAA Paper No. 87-0610.9.
McCormick
, D. C.
, and Bennet Jr
, J. C.
, 1993
, “Vortical and Turbulent Structure of a Lobed Mixer Free Shear Layer
,” Proceedings of the 25th Aerospace Sciences Meeting
, Reno, NV
, January 12–15
, pp. 1852
–1859
, AIAA Paper No. 93-0219.10.
Wang
, S. F.
, and Li
, L. G.
, 2006
, “Investigation of Flows in a New Infrared Suppressor
,” Appl. Therm. Eng.
, 26
(1
), pp. 36
–45
. 11.
Shan
, Y.
, and Zhang
, J.
, 2009
, “Numerical Investigation of Flow Mixture Enhancement and Infrared Radiation Shield by Lobed Forced Mixer
,” Appl. Therm. Eng.
, 29
(17–18
), pp. 3687
–3695
. 12.
Crowe
, D. S.
, and Martin
, C. L.
, 2015
, “Effect of Geometry on the Exit Temperature From Serpentine Exhaust Nozzles
,” Proceedings of the 53rd AIAA Aerospace Meetings
, Kissimmee, FL
, Jan. 5–9
, pp. 1
–41
.13.
Crowe
, D. S.
, and Martin
, C. L.
, 2016
, “Hot Streak Characterization in Serpentine Exhaust Nozzles
,” Proceedings of the 52nd AIAA/SAE/ASEE Joint Propulsion Conference
, Salt Lake City, UT
, July 25–27
, pp. 1
–12
.14.
Shan
, Y.
, Pan
, C.
, and Zhang
, J.
, 2015
, “Investigation on Incompressible Lobed Mixer-Ejector Performance
,” J. Propuls. Power
, 31
(1
), pp. 265
–277
. 15.
Sun
, X.
, Wang
, Z.
, Zhou
, L.
, Liu
, Z.
, and Shi
, J.
, 2016
, “Influences of Design Parameters on a Double Serpentine Convergent Nozzle
,” ASME J. Eng. Gas Turbines Power
, 138
(7
), p. 072301
. 16.
Im
, J. H.
, and Song
, S. J.
, 2015
, “Mixing and Entrainment Characteristics in Circular Short Ejectors
,” ASME J. Fluids Eng.
, 137
(5
), p. 051103
. 17.
Zheng
, F.
, Kuznetsov
, A. V.
, Roberts
, W. L.
, and Paxson
, D. E.
, 2011
, “Influence of Geometry on Starting Vortex and Ejector Performance
,” ASME J. Fluids Eng.
, 133
(5
), p. 051204
. 18.
Thompson
, J.
, Vaitekunas
, D.
, and Birk
, A. M.
, 1998
, “IR Signature Suppression of Modern Naval Ships
,” ASNE 21st Century Combatant Technology Symposium
, Biloxi, MS
, Jan. 27–30
.19.
Mishra
, D. P.
, and Dash
, S. K.
, 2009
, “Prediction of Entrance Length and Mass Suction Rate for a Cylindrical Sucking Funnel
,” Int. J. Numer. Methods Fluids
, 63
(6
), pp. 681
–700
.20.
Mishra
, D. P.
, and Dash
, S. K.
, 2010
, “Numerical Investigation of Air Suction Through the Louvers of a Funnel Due to High Velocity Air Jet
,” Comput. Fluids
, 39
(9
), pp. 1597
–1608
. 21.
Sahu
, S. R.
, and Mishra
, D. P.
, 2016
, “Numerical Investigation of Maximum Air Entrainment Into Cylindrical Louvered Pipe
,” Int. J. Automot. Mech. Eng.
, 13
(2
), pp. 3278
–3292
. 22.
Sahu
, S. R.
, and Mishra
, D. P.
, 2017
, “Maximum Air Suction Into Horizontal Open Ended Cylindrical Louvered Pipe
,” J. Eng. Sci. Technol.
, 2
(2
), pp. 388
–404
.23.
Barik
, A. K.
, Dash
, S. K.
, Patro
, P.
, and Mohapatra
, S.
, 2014
, “Experimental and Numerical Investigation of Air Entrainment Into a Louvered Funnel
,” Appl. Ocean Res.
, 48
(10
), pp. 176
–185
. 24.
Barik
, A. K.
, Dash
, S. K.
, and Guha
, A.
, 2015
, “Entrainment of Air Into an Infrared Suppression (IRS) Device Using Circular and Non-Circular Multiple Nozzles
,” Comput. Fluids
, 114
(7
), pp. 26
–38
. 25.
Barik
, A. K.
, Dash
, S. K.
, and Guha
, A.
, 2014
, “New Correlation for Prediction of Air Entrainment Into an Infrared Suppression (IRS) Device
,” Appl. Ocean Res.
, 47
(8
), pp. 303
–312
. 26.
Barik
, A. K.
, Dash
, S. K.
, and Guha
, A.
, 2015
, “Experimental and Numerical Investigation of Air Entrainment Into an Infrared Suppression Device
,” Appl. Therm. Eng.
, 75
(10
), pp. 33
–44
. 27.
Chandrakar
, V.
, and Senapati
, J. R.
, 2020
, “Numerical Investigation of Flow and Heat Transfer Characteristics of a Full-Scale Infrared Suppression Device With Cylindrical Funnels
,” Int. J. Therm. Sci.
, 153
(7
), p. 106355
. 28.
Ganguly
, V. R.
, and Dash
, S. K.
, 2019
, “Experimental and Numerical Study of Air Entrainment Into a Louvered Conical IRS Device and Comparison With Existing IRS Device
,” Int. J. Therm. Sci.
, 141
(7
), pp. 114
–132
. 29.
Singh
, P.
, Singh
, S. N.
, and Seshadri
, V.
, 2009
, “Experimental Investigation of Non-Circular Ejector Air Diffuser
,” Proceedings of the 39th AIAA Fluid Dynamics Conference
, San Antonio, TX
, June 22–25
, Paper No. 4213-23.30.
Singh
, P.
, Singh
, S. N.
, and Seshadri
, V.
, 2014
, “Effect of Number of Slots and Overlap on the Performance of Non-Circular Ejector Air Diffuser
,” Proceedings of the 32nd Applied Aerodynamics Conference
, Atlanta, GA
, June 16–20
, Paper No. AIAA 2837.31.
Singh
, P.
, Singh
, S. N.
, and Seshadri
, V.
, 2018
, “Studies on Stepped Air Ejector Diffusers Incorporating Heat Transfer Effects
,” Int. J. Turbo Jet Engines
, 35
(3
), pp. 251
–263
. 32.
Singh
, L.
, Singh
, S. N.
, and Sinha
, S. S.
, 2018
, “Effect of Standoff Distance and Area Ratio on the Performance of Circular Exhaust Ejector Using Computational Fluid Dynamics
,” Proc. Inst. Mech. Eng. G J. Aerosp. Eng.
, 232
(2
), pp. 2821
–2832
. 33.
Singh
, L.
, Singh
, S. N.
, and Sinha
, S. S.
, 2021
, “Enhancement of Air Entrainment in Ejector-Diffuser Using Plate Guidance at Slots to Reduce Infrared Emission
,” Proc. Inst. Mech. Eng. G J. Aerosp. Eng.
, 235
(10
), pp. 1284
–1305
. 34.
Singh
, L.
, Singh
, S. N.
, and Sinha
, S. S.
, 2020
, “Effect of Reynolds Number and Slot Guidance on Passive Infrared Suppression Device
,” Aerosp. Sci. Technol.
, 99
(4
), p. 105732
. 35.
Jha
, P. K.
, and Dash
, S. K.
, 2004
, “Employment of Different Turbulence Models to the Design of Optimum Steel Flows in a Tundish
,” Int. J. Numer. Methods Heat Fluid Flow
, 14
(8
), pp. 953
–979
. 36.
Pritchard
, R.
, Guy
, J. J.
, and Connor
, N. E.
, 1977
, Handbook of Industrial Gas Utilization: Engineering Principles and Practices
, 1st ed., Bowker Publishing Company
, New York
.37.
Ricou
, F. P.
, and Spalding
, D. B.
, 1961
, “Measurements of Entrainment by Axisymmetric Turbulent Jets
,” J. Fluid Mech.
, 11
(1
), pp. 21
–32
. 38.
Becker
, H. A.
, Hottel
, H. C.
, and Williams
, G. C.
, 1962
, “Mixing and Flow in Ducted Turbulent Jets
,” Proceedings of the 9th International Symposium Combustion
, Pittsburgh, PA
, Aug. 27–Sept. 1
.39.
FLUENT Manual
, 2006
, FLUENT Inc., Lebanon, NH40.
Sahoo
, A. K.
, Barik
, A. K.
, and Swain
, P. K.
, 2021
, “Evolutionary Design of Novel Coolant Passages for Cooling a Square Substrate by Single Stream
,” ASME J. Heat Transfer-Trans. ASME
, 143
(8
), p. 081802
. 41.
Barik
, A. K.
, Rout
, S.
, and Patro
, P.
, 2020
, “Evolution of Designs for Constructal Cooling of a Square Plate Using Water, Ionic Liquid, and Nano-Enhanced Ionic Liquids
,” ASME J. Therm. Sci. Eng. Appl.
, 12
(2
), p. 021020
. 42.
Mukherjee
, A.
, Chandrakar
, V.
, and Senapati
, J. R.
, 2021
, “New Correlations for Flow and Conjugate Heat Transfer With Surface Radiation Characteristics of a Real-Scale Infrared Suppression System With Conical Funnels
,” ASME J. Heat Transfer-Trans. ASME
, 143
(8
), p. 082101
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