Change of power in flow of kinetic energy
Air at 20 m/s, 260 K, 75 kPa with 5 kg/s flows into a jet engine and it flows out at 500 m/s, 800 K, 75 kPa. What is the change (power) in flow of kinetic energy?
Expert
m.ΔKE = m.1/2(V2e–V2i)
= 5 kg/s×12 (5002 – 202) (m/s)21
1000 (kW/W) = 624 kW
You can consider air and in these condition the first term of the equation will be cancelled out as there will be no role of enthalpy.
Above is an e.g. Of similar question
The only consideration is of Potential energy and kinetic energy and in the question no mass flow rate is given
PV = RTV = RT/P =8.314*(100+273)/100 =31.0122
Mass Flow Rate, m = V/v = 31.0122/90=.34456
The continuity Equation(Ve2 –Vi2)/2 +g(Ze - Zi)=(Q +W)/m
Also Q = 0
Putting all the values and soling we get
W=1391.17 kw
Concurrent Engineering has happened primarily as a result of the need to shorten product development times, but improving product quality and reducing product life-cycle costs are important considerations. Some companies have even gone to the extent o
Out of Rubber/Steel/Wood, which have higher Poissons Ratio?
Wrap-around: The main aim of a wrap-a-round is to make a straight line about a pipe to help in cutting the pipe to its appropriate length. It is employed mostly as a straight edge or a template.
In the below system, d = 6 in., D = 12 in., Δz1 = 6 ft, and Δz2 = 12 ft. The discharge of water in the given system is 10 cfs. Is the machine a turbine or a pump ? Determine the pressures at points A and B? Neglect head losses. Suppos
The value engineering method focuses on functional values, and aims to increase the difference between the cost and value of a product: by lowering cost and/or adding value. In many cases, the emphasis is simply on reducing costs, and the design effor
Specify how the Bearing number ti Diameter of the inner and outer can be calculated?
Why free vibration takes place at MDOF system?
Explain the term Carnot engine?
theories for the origin of petroleum, methods for detection of petroleum deposits, fractional distillation
Explain difference between the Anti-Friction Bearing and the Journal Bearing?
18,76,764
1926144 Asked
3,689
Active Tutors
1448218
Questions Answered
Start Excelling in your courses, Ask an Expert and get answers for your homework and assignments!!