Question

A J57 turbojet engine is tested at sea-level, static, standard-day conditions (Po = 14.696 psia, To =518.7°R, and Vo = 0). At one test point, the thrust is 10,200 lbf while the airflow is 164 Ibm/s and the fuel flow is 8520 lbm/h. Using these data, estimate the exit velocity Ve for the case of exit pressure equal to ambient pressure (Po - Pe).

Answer 1

please give some positive rating.. i have less cf score..

Calculate exit velocity (vi) using equation for Thrust(F), (m. +m,)v, +m,v. F= +(P.-P.)A, 8 (164 ibm/sec +8520 lbm/hr) v; +164 (0) +(0)4, 10200 lbf ft-lbm 32.174 Ibf-seca ft-lbm 10200 lbf x 32.174. Ibf-sec 166.366 Ibm sec v = 1972.61 ft/sec

Thank You So Much..