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Design and Numerical Flow Analysis of Expansion Deflection Nozzle
Shaik Abdul Muwaaz,  Nazumuddin Shaik
Expansion deflection (ED) nozzles are being considered in the development of upper stages of launching vehicles because of their altitude compensating characteristics. This paper deals with the design of expansion deflection nozzle by using Gmbit and numerical flow analysis by using computational fluid dynamics code Ansys Fluent. For this purpose nozzle with expansion deflection or pintle is placed linearly at 20%, 30% and 50% after the throat of the nozzle. Simulations were carried out at same operating conditions for three different cases to represent under expansion, ideal expansion and over expansion conditions of the flow. The flow fields obtained through the numerical simulation were analyzed to know the effect of expansion deflection on the performance of ED nozzle. The results have shown different cases of expansion. The ideal expansion behavior was observed at 20% to 35% locations of expansions deflection and external flow effects are small. The research of this nozzle continues and also being investigated further and performance is predicted for the use of single stage to orbit (SSTO) allowing for a substantial increase in payload.
Unique Identification Number - IJEDR1602189Page Number(s) - 1081-1094Pubished in - Volume 4 | Issue 2 | May 2016DOI (Digital Object Identifier) -    20-4-92, kotamittaPublisher - IJEDR (ISSN - 2321-9939)
Cite this Article
Shaik Abdul Muwaaz,  Nazumuddin Shaik,   "Design and Numerical Flow Analysis of Expansion Deflection Nozzle"
, International Journal of Engineering Development and Research (IJEDR), ISSN:2321-9939, Volume.4, Issue 2, pp.1081-1094, May 2016, Available at :http://www.ijedr.org/papers/IJEDR1602189.pdf