What PSI Results from an 8 lb Thrust in a Closed Container?

In summary, the conversation discusses the potential pressure inside a closed container when a RC electric ducted fan engine is continuously running and producing 8 lb of thrust. The pressure would depend on the size of the container and how the stream of air is captured. For a coherent stream of air hitting a wall, the force can be divided by the area to determine the pressure. If the ducted fan is acting as a compressor and its output is going into a closed container, the pressure would be 8 lbs divided by the cross-sectional area of the duct containing the fan. This means that for a duct with a diameter of 4 inches, the pressure would be approximately 0.636 psi.
  • #1
Subaru_STI
2
0
If I have a RC electric ducted fan engine blowing at 8 lb of thrust into a closed container, what PSI would it be inside of the container, (when the engine is runny continuously)?

Thanks
 
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  • #2
Depends on the size of the container and how the stream is captured. For a coherent stream of air hitting a wall, you can take the force and divide by the area.
 
  • #3
I am basically making a battery powered supercharger for a car. the motor will be fitted into the intake tube.. can you get a rough idea from that?
 
  • #4
Subaru_STI said:
If I have a RC electric ducted fan engine blowing at 8 lb of thrust into a closed container, what PSI would it be inside of the container, (when the engine is runny continuously)?
Your statement implies that there's a net pressure differential between the contaniner and the outside air that results in 8 lbs of force at the fan. Also, there's no blowing, the ducted fan is acting as a compressor if it's output is going into a closed container. The pressure would be 8 lbs divided by the cross sectional area of the duct containing the fan. If the duct has a diameter of 4 inches, then the area of the duct is pi x r^2 = pi x (2)^2 = 12.566 in^2. Pressure would be 8 lbs / 12.566 in^2 ~= .636 psi.
 
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1. What is thrust producing pressure?

Thrust producing pressure is the force that is exerted by a propulsion system, such as a rocket or jet engine, to propel an object forward. This pressure is created by the expulsion of high-velocity gases from the back of the system, which creates a reactive force in the opposite direction.

2. How is thrust producing pressure calculated?

Thrust producing pressure is calculated by multiplying the mass flow rate of the exhaust gases by their velocity. This is known as the thrust equation: F = ṁv, where F is the thrust force, ṁ is the mass flow rate, and v is the velocity of the exhaust gases.

3. What factors affect thrust producing pressure?

Thrust producing pressure is affected by several factors, including the size and design of the propulsion system, the type and amount of propellant used, and the ambient conditions such as air density and temperature. The efficiency of the system also plays a role in determining the amount of thrust produced.

4. Can thrust producing pressure be increased?

Yes, thrust producing pressure can be increased by increasing the mass flow rate of the exhaust gases or by increasing their velocity. This can be achieved by using a more powerful propulsion system, optimizing the design of the system, or using more efficient propellants.

5. How is thrust producing pressure used in space travel?

In space travel, thrust producing pressure is used to overcome the gravitational pull of a planet or other celestial body and to propel spacecraft into orbit or to other destinations. It is also used for course corrections and to control the movement and orientation of the spacecraft during its journey.

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