|Dec8-10, 08:44 AM||#1|
thrust in propeller engines
Can anyone help me?
I'm doing a question on aircraft propulsion technology and i'm stuck.
The question is:
'If the mass of air through a propeller is 1000 Kg/s, the aircraft's velocity is 100 m/s and the slipstream velocity is 120 m/s, calculate the thrust?
Attempt at answer:
Surely if F = ma then the equation should be F = 1000 * 100 = 10000 Kg/s
But I don't think this is the right answer as I have not taken the slipstream velocity in to consideration.
The only other equation I can find is
F = (m dot * V)e - (m dot * V)0 + (pe - p0) * Ae
But I don't have pe or p0 or Ae neither do I understand what they are.
Can someone please steer me in the right direction?
|Dec8-10, 01:01 PM||#2|
Hi, with the given conditions, thrust can be calculated by using the formula:
Thrust = Mass airflow X (slipstream velocity-aircraft velocity).
Below website has good information may be it helps you.
|Dec8-10, 01:36 PM||#3|
Thanks very much.
It seems so simple now, just couldn't see it.
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