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Introduction Of A Delta Wing

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INTRODUCTION TO DELTA WING: The with Planform area in the shape of a Triangle is called a Delta wing. Supersonic flow is completely different from subsonic flow in many respects. Such differences impact the design philosophy of aircrafts for supersonic flights in comparison to subsonic flight aircrafts. Our study deals with the design and subsonic flow over a delta wing. Supersonic aircrafts usually have highly swept wings. A special case of that with triangular planform is called a delta wing. Though delta wing aircrafts are high speed vehicles, they fly at low speed during takeoff and landing. Also in most cases, these aircrafts spend majority of their flight time at subsonic speeds, using their supersonic capabilities for short durations depending upon their mission requirements. Following are some examples of aircrafts with delta wing; • Convair F-102A • Many space shuttles (hypersonic speed) The Concorde, a delta-winged passenger aircraft, is an exception which cruises at supersonic speed. Types of Delta wing: • Simple delta- Normal, triangular planform. For eg. Tejas. • Cropped delta- The tip is cut off, which avoids tip drag at high angles of attack for eg. F-16. • Notched delta- Sweepback at the rear of the delta wing. • Double delta- also known as compound delta, inner section usually has a steeper leading edge sweep. When low speed subsonic flow passes over a sharp convex corner, there is an infinite velocity at the corner (by inviscid flow theory). This

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