Cooling of exhaust gases as a possibility to increase stealth properties of military helicopters

• Autorzy: Paszko M.

Identyfikatory

DOI

10.5604/01.3001.0010.2828

• Języki publikacji: EN

Abstrakty

EN

Helicopters, in comparison to other aircrafts, have much lower flight speeds and manoeuvrability, which makes them easy targets for actual combat assets like ground to air or air-to-air infrared-guided missiles. Current techniques aim to increase the combat effectiveness and lifetime of military helicopters performing combat missions by reducing the possibility of their detection on battlefield, thereby increasing their flight time without fire attack and reduce effects of potential strike. When designing new helicopter types, especially for combat applications, it is essential to pay enormous attention to infrared emissions of the solid parts composing the helicopter’s structure, as well as to exhaust gases egressing from the engine’s exhaust system. Due to their high temperature, exhaust gases, egressed to the surrounding are a major factor in infrared radiation emission level and, in consequence, detectability of a helicopter performing air combat operations. This article presents the possibility to decrease the infrared radiation level that is emitted to the environment by helicopter in flight, by cooling hot exhaust in special ejective cooler. Article presents also the exhaust cooler operation principles and results of numeric analysis of concept exhaust cooler adapted to cooperate with PA-10W turbine engine. Numeric analysis presented promising results in decreasing the infrared emission level by PA W-3 helicopter in flight, as well as increasing its stealth properties.

Słowa kluczowe

EN

helicopter; exhaust; radiation; cooler; stealth

PL

helikopter; gazy spalinowe; promieniowanie; chłodnica

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2017
• Tom: Vol. 24, No. 1
• Strony: 281--290
• Opis fizyczny: Bibliogr. 13 poz., rys.

Twórcy

autor

Paszko M.

• Lublin University of Technology Department of Thermodynamics, Fluid Mechanics and Aviation Propulsion Systems Nadbystrzycka Street 36, 20-618 Lublin, Poland tel. [phone], fax: [phone]

Bibliografia

• [1] Ansys: Modeling Turbulent Flows, Introductory FLUENT Training, 2006.
• [2] Grant, R., The Radar Game Understanding Stealth and Aircraft Survability, Mitchell Institute 2010.
• [3] Groninga, K., Development and implementation of the H-1 turned exhaust system, AHS, Texas 2005.
• [4] Fijałkowski, S., The Experiment – Based Analysis of the Infrared Emission by a Helicopter in Flight, IBTL Reports, Warsaw 2011.
• [5] Fijałkowski, S., Performance model of turbine engine exhaust cooler in extreme conditions helicopter flights, Part 1, Identification of membranneless exhaust gas cooler interaction with the helicopter turbine engine, IBTL Reports 194-195, Warsaw 2008.
• [6] Paszko, M., Analysis of the influence of swirls in ejective helicopter cooler on the process of cooling of exhaust gases emitting into the atmosphere, Master Thesis at Lublin University of Technology, Lublin 2015.
• [7] Pan, C., Zhang, J., Shan, Y., Progress in helicopter infrared signature suppression Chinese Journal of Aeronautics, 27(2): 189-199, 2014.
• [8] PZL-10W Engine, Technical Characteristics, WSK, Rzeszów.
• [9] Vass, S., Stealth Technology Deployed in battlefield, AARMS, 2003.
• [10]Wilcox, D. C., Formulation of the k-omega Turbulence Model Revisited, AIAA Journal, Vol. 46, No. 11, pp. 2823-2838, 2008.
• [11]Wilcox, D. C., Turbulence Modeling for CFD, 3rd edition, DCW Industries, Inc., La Canada, CA 2006.
• [12] Zikidis, K., Skondras, A., Tokas C., Low Observable Principles, Stealth Aircraft and Anti-Stealth Technologies, Journal of Computations & Modelling, Vol.4, No.1, 129-165, 2014.
• [13] Internet sources: www.aircav.com/cobra/ahgal24/ah1w-070517.html; www.richardseaman. com/Wallarticle/Aircraft/Helicopters/SuperCobraAndWallOfFire_1.jpg

Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017).