PRESENTED BY NITIN D. MALI (R.N.33) GF’S GODAVARI COLLEGE OF ENGINEERING , JALGAON SEMINAR ON PISTONLESS PUMP FOR ROCKETS INTRODUCTION Starting a turbo pump fed rocket engine is a complex process, requiring a careful of many valves and subsystems. This pump saves up to 90% of the mass of the tanks as compa.red to a pressure fed system WORKING: Rocket engines requires a tremendous amount of fuel high at high pressure .Often th pump costs more than the thrust chamber.One way to supply fuel is to use the expensive turbopump mentioned above,another way is to pressurize fuel tank. Pressurizing a large fuel tank requires a heavy , expensive tank. ADVANTAGES: Nearly all of the hardware in this pump consists of pressure vessels, so the weight is low.There are less than 10 moving parts ,and no lubrication issues which might cause problems with other pumps. The design and constr. Of this pump is st, forward and no precision parts are required 2)This pump has the advantage over pressure fed designs in that the wt. of the complete rocket is much less, and the rocket is much safer because the tanks of rocket fuel do not need to be at high pressure . APPLICATIONS: 1}DEEP SPACE PROPULSION: NASA has a need for high power propulsion to land and spacecraft on the moons of Jupitor and beyond.this pump would allow these missions to go forward due to lower weight of the fuel tanks. 2} X PRIZE VEHICLE FUEL PUMP APPLICATION: For X-prize competitors, a the fuel pump will reduce the cost and increase the safety and reliability of their amateur manned vehicles . INSTALLATION FIGURE: ACTUAL DIAGRAM DISADVANTAGES: The pistonless pumps has disadvantages along with such fine advantages. 1}They cannot pump to higher pressure than drive gas (area ratio is 1:1) 2}They cannot use either a staged combustion or expander cycle. 3}A gas generator cycle is also difficult to integrate with the pistonless pump. 4}The generated gas must be chemically compatible with both the propellants. 5}This gas generator lowers the Ignition start period of the engine. CONCLUSION: The most significance of property of Pistonless pump that makes them different from that of turbo pump ,is the absence of piston. This is the most unique technique.In this ,no. of rotating parts is very less as compared to that of turbopump. Also, it’s installation is very easy.and moreover, it is light weight than turbo pump.So, it has less losses and improves,rather increases efficiency of engine.Also, it is much economical that turbopump. THANK YOU