Question

In: Mechanical Engineering

A converging nozzle feeds an insulated square duct (L = 224 ft, W = H =...

A converging nozzle feeds an insulated square duct (L = 224 ft, W = H = 8.0 in, f = 0.02) with air flowing steadily at 7200 lbm/min. The inlet stagnation temperature and stagnation pressure are respectively equal to 116 deg F and 190 psia. Calculate the exit Mach number, exit pressure, exit stagnation pressure and exit stagnation temperature. Ans. 0.67, 70.2 psia, 94.9 psia, 116 deg F.

Solutions

Expert Solution


Related Solutions

Hot air flows with a mass flow rate of 0.05 kg/s through an insulated square duct...
Hot air flows with a mass flow rate of 0.05 kg/s through an insulated square duct with side of 0.15m, the hot air enters at 103 oC and after a distance of 5m, cools to 85 oC. The heat transfer coefficient between the duct outer surface and the ambient air (Tair = 0 oC) is 6 W/m2 K. Calculate the heat transfer coefficient between hot air and duct inner wall. Air Cp = 1.011 KJ/kg K; air k = 0.0306...
A high-­viscosity oil is transported through a wide rectangular duct of length L, width W and...
A high-­viscosity oil is transported through a wide rectangular duct of length L, width W and depth 2B via pressure-­driven flow. The duct is inclined at an angle b? below the horizontal plane (gravity may be assumed to act downwards in the vertical direction), and is sufficiently broad that edge effects may be neglected in the transverse (x2) direction. The pressure at the upstream end of the duct (x1=0) is Po, and at the downstream end (x1=L) is PL. The...
The length l, width w, and height h of a box change with time. At a...
The length l, width w, and height h of a box change with time. At a certain instant the dimensions are l = 2 m and w = h = 3 m, and l and w are increasing at a rate of 7 m/s while h is decreasing at a rate of 5 m/s. At that instant find the rates at which the following quantities are changing. (a) The volume. m3/s (b) The surface area. m2/s (c) The length of...
Question#1: Based on the aggregate production function: GDP = FT (L, K, H) a. Imagine that...
Question#1: Based on the aggregate production function: GDP = FT (L, K, H) a. Imagine that the amount of capital K increases by 10% (from 50 to 55 units) while labour and technology stay the same. How much does total GDP and GDP per worker change by? (A specific percentage is not needed, just ‘more than’ / ‘less than’ 10%.) b. Imagine that capital increases by 5 units again, from 55 to 60. How big is the resulting change in...
Convert: a. Thermal conductivity value of 0.3 Btu/(h ft oF) to W/(m oC). b. Surface heat...
Convert: a. Thermal conductivity value of 0.3 Btu/(h ft oF) to W/(m oC). b. Surface heat transfer coefficient value of 105 Btu/(h ft^2 oF) to W/(m^2 oC)
A wire of length L has a rectangular cross-section with height H and width W. The...
A wire of length L has a rectangular cross-section with height H and width W. The wire has a hole all the way through it of area a. The wire is made of material with constant resistivity ρ1 . A battery with a known voltage is applied across the ends of the wire. a. Find the electric field inside the material and the current flowing through the wire. b. If the hole is totally filled with a material that has...
I need a box and it must adhere to the following: L+2W+2H<130, L<70, W<40, H<18. I'd...
I need a box and it must adhere to the following: L+2W+2H<130, L<70, W<40, H<18. I'd like to know the dimensions required to maximize my box volume. Any help is appreciated, and please let me know if this does not give enough information to solve.
If tax revenue is given by the following function: REV(t)=t×w×(h-l(t)), where t is the labor tax...
If tax revenue is given by the following function: REV(t)=t×w×(h-l(t)), where t is the labor tax rate, w is the wage rate, h is the maximum amount of time available to the household, and l(t) is leisure as an increasing function of the tax rate i.e. if the labor tax rate t increases, leisure increases, so that individuals work less. Assume that l(t)=min[h,t²]. This simply means that leisure cannot exceed h which is the maximum amount of time available. Find...
1. Consider the following utility maximization problem: U(c,l)=log(c)+log(l) W=5, h=1, π-T=2 π= non wage income (ex....
1. Consider the following utility maximization problem: U(c,l)=log(c)+log(l) W=5, h=1, π-T=2 π= non wage income (ex. dividends) T=taxes w=wage h=time endowment What is the optimal choice for consumption? what is the optimal level of leisure? what is the optimal level of labor supply? assume that π−T=1. what is the optimal level of consumption? what is the optimal level of leisure? what is the optimal level of labor supply? Now assume that π−T=2 and w=6 What is the optimal choice for...
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT