Ali R. Tahavvo - Assistant Professor, Mechanical Eng. Department, Islamic Azad University, Shiraz Branch, Shiraz
A. Hosainpour - M.Sc. student of Mechanical Engineering, Mechanical Eng. Department, Islamic Azad University, Shiraz Branch

Testing is performed on the 450 centimeter pulsejet engine in order To develop, study, and explore the operational characteristics. Valve less operation, propane fuel, and a range of geometric configurations are investigated for operational feasibility. The scaling capabilities of a valve less 450 centimeter class pulsejet of conventional design are studied by methodically varying inlet length, exit length, exit geometry, and inlet area to combustor area ratio (Ai/Ac). Engine performance is defined by measuring chamber pressure ,internal gas temperatures, time-resolved thrust, and fuel flow rate. The scaling capability is characterized by the success of self-sustained combustion for each corresponding geometric configuration. Tail pipe length is found to be a function of valve less inlet length and may be further minimized by the addition of a diverging exit nozzle. Chemical kinetic times and Ai/Ac prove to be the two prominent controlling parameters in determining scaling behavior. range of geometric configurations of this engine are a combustion chamber white. 10.8 centimeterr,5 centimeter inlet diameter ,and 12cm exit diameter.

pulse jet , thrust