Reference no: EM13714165
Engine and Nozzle
Consider a rocket engine with a convergent-divergent nozzle operating at sea level. The pressure in the combustion chamber is Pc= 10 MPa, with a combustion temperature of Tc= 2400 K. The static pressure measured in the throat of the rocket nozzle is Pt = 6 MPa. Assume a specific heat ratio (gamma) = 1.4 for the exhaust gases.
a) Calculate the Mach number of the gas flow in the throat of the nozzle.
b) Given this Mach number at the throat, will the gas stream ever reach supersonic speeds in the nozzle? Explain why.
c) If the static pressure at the nozzle throat is to remain unchanged, what must the pressure in the combustion chamber be in order for the flow to reach supersonic velocity in the nozzle?
d) If the temperature in the combustion chamber remains unchanged, what is the temperature at the nozzle throat?
e) From the throat, the stream is isentropic ally expanded until it reaches the exhaust. The static pressure at the exhaust is ambient pressure. Calculate the exhaust temperature.
f) The velocity of the exhaust stream is Ve= 4500 m/s . The rocket exhaust has a cross- sectional area of Ae= 3.8 m^2. Using the area-Mach number relation, calculate the cross- sectional area at the nozzle throat.
|
What is the cars acceleration while braking
: It is possible to calculate the coefficient of friction between a vehicles tires and the road by measuring the vehicles stopping distance. What is the cars acceleration while braking
|
|
Change in kinetic energy per unit mass of water
: Liquid water enters a valve at 300 kPa and exits at 275 kPa. As water flows through the valve, the change in its temperature, stray heat transfer with the surroundings and potential energy effects are negligible. Operation is at steady state. Modelin..
|
|
Explain what differences are and what skills are critical
: The changing business and global environment in the 21st century will demand successful leaders of the future to have different skills and characteristics than the leader in the past. If you agree, please explain what the differences are and wh..
|
|
Find horizontal distance from where the dart was launched
: A dart is fired at ground level with an initial speed of 42 m/s, at an angle of 25° above the horizontal. What is the horizontal distance, in meters, from where the dart was launched to where it lands
|
|
Engine and nozzle problem
: Consider a rocket engine with a convergent-divergent nozzle operating at sea level. The pressure in the combustion chamber is Pc= 10 MPa, with a combustion temperature of Tc= 2400 K. The static pressure measured in the throat of the rocket nozzle is ..
|
|
What is the heat duty of the heat exchanger
: 150 mol/s of cyclohexane enter a heat exchanger at 25?C and 3 atm and leaves as a vapor at 125?C. The normal boiling point of cyclohexane is 80.7?C; at the normal boiling point, the heat of vaporization is 30.1 kJ/mol. The liquid-phase heat capacit..
|
|
Find the tension in the string between blocks
: Three identical blocks, A, B, and C, are on a horizontal frictionless table. Find the tension in the string between blocks
|
|
Discuss the history of the european monetary union
: A). Discuss the History of the European Monetary Union (EMU).B). How does it affect the business environment (positively or negatively) in the member countries?
|
|
Calculate how far the tendon stretches
: Human feet and legs store elastic energy when walking or running. They are not nearly as efficient at doing so as kangaroo legs, but the effect is significant nonetheless. Calculate how far the tendon stretches
|