3/31/2023 0 Comments Entropy journal![]() K., “ Experimental and Numerical Study of Air Entrainment into a Louvered Conical IRS Device and Comparison with Existing IRS Devices,” International Journal of Thermal Sciences, Vol. 141, July 2019, pp. 114–132. and Guha A., “ Entrainment of Air into an Infrared Suppression (IRS) Device Using Circular and Non-Circular Multiple Nozzles,” Computers and Fluids, Vol. 114, July 2015, pp. 26–38. and Mohapatra S., “ Experimental and Numerical Investigation of Air Entrainment into a Louvred Funnel,” Applied Ocean Research, Vol. 48, Oct. 2014, pp. 176–185. and Guha A., “ Experimental and Numerical Investigation of Air Entrainment into an Infrared Suppression Device,” Applied Thermal Engineering, Vol. 75, Jan. 2015, pp. 33–44. K., “ Numerical Investigation of Air Suction Through the Louvers of a Funnel Due to High Velocity Air Jet,” Computers and Fluids, Vol. 39, No. 9, 2010, pp. 1597–1608. K., “ Prediction of Entrance Length and Mass Suction Rate for a Cylindrical Sucking Funnel,” International Journal for Numerical Methods in Fluids, Vol. 63, No. 6, 2010, pp. 681–700. and Vaitekunas D., “ IR Signature Suppression of Modern Naval Ships 1,” ASNE 21st Century Combatant Technology Symposium, 1998, pp. 1–9. and VanDam D., “ Infrared Signature Suppression for Marine Gas Turbines: Comparison of Sea Trial and Model Test Results for the DRES Ball IRSS System,” Journal of Engineering for Gas Turbines and Power, Vol. 116, No. 1, 1994, p. 75. E., “ Suppressing the Infrared Signatures of Marine Gas Turbines,” Journal of Engineering for Gas Turbines and Power, Vol. 111, No. 1, 1989, pp. 123–129. ![]() ![]() and Lu H., “ Experimental Investigation on Infrared Radiation Characteristics of Two-Dimensional Convergent-Divergent Vectoring Nozzle,” Journal of Thermophysics and Heat Transfer, Vol. 33, No. 1, 2019, pp. 627–637. and Shi J., “ Investigation of Infrared Signature of Serpentine Nozzle for Turbofan,” Journal of Thermophysics and Heat Transfer, Vol. 33, No. 1, 2019, pp. 170–178. and Liu X., “ Simulation of the Infrared Emission from Two Typical Exhaust Systems,” 15th International Energy Conversion Engineering Conference, AIAA Paper 2017-4866, 2017, pp. 1–10. P., “ Effect of Atmospheric Transmission and Radiance on Aircraft Infrared Signatures,” Journal of Aircraft, Vol. 42, No. 4, 2005, pp. 1046–1054. and Arvind Rao G., “ Study of Sunshine, Skyshine, and Earthshine for Aircraft Infrared Detection,” Journal of Optics A: Pure and Applied Optics, Vol. 11, No. 4, 2009, Paper 045703. G., “ Numerical Studies of Infrared Signature Levels of Complete Aircraft,” Aeronautical Journal, Vol. 105, No. 1046, 2001, pp. 185–192. and Li T., “ A New Model to Simulate Infrared Radiation from an Aircraft Exhaust System,” Chinese Journal of Aeronautics, Vol. 30, No. 2, 2017, pp. 651–662. and Shan Y., “ Progress in Helicopter Infrared Signature Suppression,” Chinese Journal of Aeronautics, Vol. 27, No. 2, 2014, pp. 189–199. and Shan Y., “ Modeling and Analysis of Helicopter Thermal and Infrared Radiation,” Chinese Journal of Aeronautics, Vol. 24, No. 5, 2011, pp. 558–567. and Shan Y., “ Effects of Exhaust Temperature on Helicopter Infrared Signature,” Applied Thermal Engineering, Vol. 51, Nos. 1–2, 2013, pp. 529–538. Also, results indicate that the increase in the number of funnels (from 4 to 5 funnels) has a negligible effect on total irreversibility. Moreover, entropy production because of heat transfer has the main contribution in total entropy production rather than that caused by fluid friction. It is found that high-temperature exhaust fluid gives a higher value of entropy production. ![]() The effect of nozzle exhaust fluid temperature and funnel numbers is mainly studied in various quantities like heat transfer, entropy generation, and irreversibility caused by heat transfer and fluid friction. The relevant parameters, viz., Reynolds number at nozzle inlet ( 1 × 10 6 to 3.6 × 10 6 ), the temperature of nozzle inlet fluid (423 to 723 K), and the number of funnels (3 to 5), are varied. The governing differential equations (Navier–Stokes equation, energy equation) and the turbulence equations are solved using ANSYS Fluent 15.0. The present study involves analyzing entropy generation on an infrared suppression system for ocean liners. ![]()
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