Engineering, 10.04.2020 00:23 ariellewallenst3393

A rocket motor with a specific impulse (Isp) of 270 seconds is test-fired. The motor is designed with an optimal nozzle that allows full expansion at sea-level. The test verifies that the rocket motor has an average chamber pressure (Pc) of 8.0 MPa. The rocket uses the hypergolic propellants: nitrogen tetroxide (N2O4) and Aerozine 50 [A- 50, a 50/50 mixture of hydrazine (N2H4) and unsymmetrical dimethyl hydrazine (UDMH, C2H3N2)], which produce combustion products that have a ratio of specific heats (y) of 1.3 and a molecular weight (Mw) of 21.3 kg/kmole. The atmospheric pressure at sea-level (Po) is 101.325 kPa. [6x4=24 points] (1) Calculate the ideal thrust coefficient (C:). (2) Calculate the characteristic velocity (C*) in m/s. (3) Determine the effective exhaust velocity (Veff) in m/s. (4) Determine the chamber temperature (Tc) in K.

Answers: 1

Show answers

Another question on Engineering

Engineering, 04.07.2019 18:10

Assuming compressible flow of air and that the measurements are done at flagstaff a pitot static tube that gives the difference of total and static pressure measures 0.35 m of mercury. what is the velocity of air? assume the temperature to be 300k. (submit your excel or matlab calculation sheet)

Answers: 1

Answer

Engineering, 04.07.2019 18:20

Amixture of slurry and mud is to be pumped through a horizontal pipe of diameter 500 mm. the fluid behaves as a bingham plastic with a yield stress of 30 pa and viscosity 0.04 pa.s. describe the effects of the shear stress through a transverse section of the pipe by plotting the variation in shear stress and velocity profile: (i) just before the slurry starts to move (ii) as the slurry flows when the pressure gradient is double that in part (i)

Answers: 3

Answer

Engineering, 04.07.2019 19:10

In general, how do thermosetting plastics compare to thermoplastics in mechanical and physical properties?

Answers: 3

Answer

Engineering, 04.07.2019 19:10

An engine, weighing 3000 n, is supported on a pedestal mount. it has been observed that the engine induces vibration into the surrounding area through its pedestal at the maximum operating speed. determine the stiffness of the dynamic vibration absorber spring in (n/m) that will reduce the vibration when mounted on the pedestal. the magnitude of the exciting force is 250 n, and the amplitude of motion of the auxiliary mass is to be limited to 2 mm note: in this question type-in right numbers, no decimals, no fractions, no unit. approximate to right number if needed

Answers: 3

Answer

You know the right answer?

A rocket motor with a specific impulse (Isp) of 270 seconds is test-fired. The motor is designed wit...

Questions