Conceptual Design of Short Takeoff Supersonic Aircraft with Cold Flow Nozzles

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  • Topic: Fluid dynamics, Aerodynamics, Mach number
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  • Published : May 20, 2013
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3rd International Conference on Trends in Mechanical and Industrial Engineering (ICTMIE'2013) January 8-9, 2013 Kuala Lumpur (Malaysia)

Conceptual Design of Short Takeoff Supersonic Aircraft with Cold Flow Nozzles Vignesh. M 1, Sathish. K1, Adrin Issai Arasu. L1, Dharun Lingam. K1, and Sanal Kumar. V.R 2 consumption and poor range) in turn making it unprofitable for manufacturers to produce these kinds of aircraft. It can cover a distance from India to USA in 2 ½ hours. Propulsion systems that provide aircraft with the capability of both vertical and conventional forward flight represent a formidable challenge to the engine designer. Vertical and short takeoff and landing (V/STOL) aircraft have several major categories of engine arrangement. Some of the typical arrangements for high speed aircraft are: the engines may be fixed in a position required to produce thrust for forward flight. Their exhaust systems, however, have built-in variable geometry, making it possible to vector the exhaust nozzle (or nozzles) or divert the exhaust gases by means of valves and auxiliary ducts to nozzles mounted in such a way as to provide vertical thrust or lift. Another option is the aircraft may include two different sets of engines or propulsors (or both), fixed in position, with one set installed for forward flight and the other for vertical thrust (i.e., the lift engines). Additionally, the aircraft may use a convertible engine. Supersonic aircraft usually use low bypass turbofans as they give good efficiency below the speed of sound as well as above, or if extended super cruise is needed turbojet engines are desirable as they give less nacelle drag at supersonic speeds. A supersonic transport (SST) is a civil aircraft designed to transport passengers at speeds greater than the speed of sound. The only supersonic civilian aircraft to see service are the Soviet produced Tupolev Tu-144 which first flew in 1968 and was retired in 1997, and the Franco-British produced Concorde, which first flew in 1969 and remained in service until 2003. Following the cessation of flying by Concorde in 2003, there are no supersonic civilian aircraft in service. These are succinctly reported in the open literature, which triggered the researchers to make attempts for unconventional lucrative design challenges of supersonic aircraft. In an attempt to resolve some of the technological challenges on supersonic aircraft design, a substantial revision of the existing concept is required. In this paper critical review of the literature is carried out and a conceptual design of short takeoff supersonic aircraft with cold flow multi-purpose rectangular nozzle has been proposed. II. LITERATURE REVIEW Bachelor of Engineering Final Year Student, Department of Aeronautical Engineering, Kumaraguru College of Technology, Coimbatore – 641 049, Tamil Nadu, India (email: vignesh.mews@gmail.com) 2 Professor and Aerospace Scientist (ISRO), Aeronautical Engineering, Kumaraguru College of Technology, Coimbatore – 641 049, Tamil Nadu, India; Corresponding Author, (phone: +91 - 9150891021 / +91-9388679565, (email: vr_sanalkumar@yahoo.co.in) 1

Abstract— In this paper numerical studies have been carried out for the conceptual design of short takeoff supersonic aircraft with cold flow nozzles. As a first step supersonic rectangular CD nozzle with multi-purpose frame is designed in such a way that during the early taxiing time the internal flow choking will be established without forming any shockwave in the divergent region for facilitating the aircraft for a smooth and short takeoff. Immediately after the takeoff the nozzle frame will be converted into rectangular supercritical wing for meeting the high speed aerodynamic design objectives. Parametric analytical studies have been carried out for both internal and external flows using suitable turbulence models. The results from the parametric study indicate that cold flow choked nozzles with conventional jet engines will...
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