c International Journal of Research (IJR) e-ISSN: 2348-6848, p- ISSN: 2348-795X Volume 2, Issue 11, November 2015 Available at http://internationaljournalofresearch.org Available online:http://internationaljournalofresearch.org/ Page | 131 A Review on Ram Jet Engine Murlidhar Patel 1 ; Prakash Kumar Sen 2 ; Gopal Sahu 3 ; Ritesh Sharma 4 & Shailendra Bohidar 5 1 Student, Mechanical Engineering, Kirodimal Institute of Technology, Raigarh (C.G.) 2,3,4,5 Lecturer, Mechanical Engineering, Kirodimal Institute of Technology, Raigarh (C.G.) Abstract Power augmented ram (PAR) engine is a popular equipment to reduce the requirement of power for takeoff and improve aerodynamic performance. To provide detailed insight into the aerodynamic characteristics of wing-in-ground effect (WIG) craft with PAR engine, numerical simulations are carried out on WIG craft models in cruise. Simplified engine models are applied to the simulations. Two cruise modes for PAR engine are considered. The aerodynamic characteristics of the WIG craft and other features are studied. Comparisons with WIG craft model without PAR show that shutoff of PAR engine results in an increase in drag and less change in lift. Accordingly for the work of PAR engine, the air flow blown from the engineaccelerates the flow around the upper surface and a high-speed attached flow near the trailing edge is recorded. With the schemed PAR flow, more suction force is realized and the flow features over the wing vary noticeably. It is also shown that the Coanda effect, provided with an attached flow, introduces an appropriate and practical flow mode for WIG craft with PARengine in cruise. The results refresh our understanding on aerodynamic characteristics of WIG craft. 1. INTRODUCTION Today, we will extend that jet engine coverage to working of ramjets and pulsejets, in which the basic cycle understanding that you have acquired for jet engines would be useful. We will also look at the cycles of ramjets and pulsejets which are similar to the cycles that you have done;so, that would be quite easy for you to extend your understanding. The ramjets and pulsejets actually historically precede those of the turbojet engines. They had actually been used for flying aircraft during the World War 2 and as a result of it understanding of how ramjets and pulsejets actually work, had been created quite some time back. However, the advent of turbojets and various kinds of turbofans actually put the ramjets and pulsejets in some kind of a backburner. Over the years, people realized that they have their utilities, especially the ramjets and the modern version of ramjets known as scramjets, which are used for high speed aircraft typically supersonic or even hypersonic aircraft, where actually you cannot use the turbojets. The turbojets: they have their utility value from subsonic to supersonic up to maybe, about Mach 3 and then beyond that you need different kind of engines or thrusters to create thrust for aircraft orflying vehicles flying at those kind of Mach numbers. So, the ramjets and scramjets have been revived and various versions of them are now under development in various countries all over the world and some of these fundamental issues of these ramjets. [1]