Numerical Evaluation of a Test Bed of an Orbital Transmission Engine in an Initial Vacuum Condition

Nematollah Fouladi; Alireza Mohammadi

Volume 2, Issue 2 , February 2023, , Pages 78-91

  The purpose of this research is to evaluate a ground test bed of an orbital transmission engine with pre-evacuation of the engine's internal space. In the usual tests on the ground, the initial pressure of the engine is atmospheric pressure. While during the orbital mission, the internal space of the ...  Read More

Heat control
Numerical Investigation of Coolant Flow Pressure Effect on the Water Jacket Design for Large Scale Diffuser at High Heat Fluxes

Nematollah Fouladi; Mohammad Farahani; Milad Mahdian Dowlatabadi

Volume 2, Issue 1 , September 2022, , Pages 34-50

  The aim of this study is to evaluate the performance of water-jacket cooling system for thermal protection of exhaust large dimension diffuser at high heat fluxes in a wide range of coolant pressure. For this purpose, using the developed calculation code, the parameters of the water-jacket cooling system ...  Read More

Experimental Study of Pre-evacuation Effect on Second throat Diffuser Starting Process

Nematollah Fouladi; sina afkhami; Mahmood PasandidehFard

Volume 1, Issue 2 , March 2022, , Pages 167-179

  In the present study, the effect of pre- evacuation on starting process of a second throat exhaust diffuser has been investigated experimentally by examining a thrust optimized parabolic nozzle. An experimental setup called high- altitude test facility has been used with compressed air as operating fluid. ...  Read More