Question

A solid propellant rocket producing 25 MN thrust is fired for 150seconds.
The specific impulse of the rocket is 2980 Ns/kg. How much propellant is

burned during the rocket operation?

(A) 8390 kg

(B) 82300 kg

(C) 1.26 x 10⁶ kg

(D) 11.2 x 10⁶ kg​

Answer 1

Answer:

A rocket is designed to produce 5 MN of thrust at sea level. The pressure in the combustion

chamber is 7 MPa and the temperature is 2,800 K. The working fluid is a perfect gas with

properties of air at room temperature. The Universal Gas Constant is ℜ = 8.314 J ⋅(mol ⋅K)

−1

.

Pressure conversion: 1 atm = 101,325 Pa = 101,325 N/m2

.

Determine:

a.) exit velocity,

b.) specific impulse,

c.) mass flow rate,

d.) throat diameter,

e.) exit diameter.

Explanation:

SO, UR ANSWER IS B.82300 KG