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QUESTION 1 (10 Marks) a) State two assumptions for the Bernoulli equation and explain why that...
The figure shows a Venturi flow characterized by a a smooth contraction of the pipe diameter...
The figure shows a Venturi flow characterized by a a smooth contraction of the pipe diameter D, to a throat diameter D2. The Venturi flow meter is connected to a n-tube manometer at location A where the pipe diameter is D, and to the throat of the contraction at location E where the diameter is D2. Assuming that the density of the air inside the n-tube is negligible, use your knowledge on hydrostatics, continuity and Bernoulli equation to calculate the...
2(P1-P) B4) Where (1 mark) (iii) Based on relation 1 above, write an expression for the...
2(P1-P) B4) Where (1 mark) (iii) Based on relation 1 above, write an expression for the volume flow rate for the two cases: a) Ignoring losses (0.5 mark) b) Accounting for the losses at the obstruction (0.5 mark) (iv) The value of The value of C (coefficient of discharge) depends on both B and the Reynolds number. Discuss this statement considering various types of obstruction meters. (0.5 mark) (V) The flow rate of methanol at 20°C (p=788.4 kg/m3 and -5.857...
'THE BERNOULLI EQUATION CAN BE DERIVED BY PERFORMING A FORCE BALANCE UPON AN ELEMENTAL 'STREAMTUBE' IN...
'THE BERNOULLI EQUATION CAN BE DERIVED BY PERFORMING A FORCE BALANCE UPON AN ELEMENTAL 'STREAMTUBE' IN FLOW AND, WHEN APPLIED FROM POINT 1 TO POINT 2 ON A STREAMLINE CAN BE WRITTEN AS P1+1/2 U1^2 TIMES DENSITY +DENSITY x gxZ1=..........., state 4 fundamental assumptions about the flow that are employed in the derivation of bernoulli equation 8 marks
1. A machined entrance cone venturi to be installed into a 15-cm (inlet diameter) pipe, which...
1. A machined entrance cone venturi to be installed into a 15-cm (inlet diameter) pipe, which transports a water flow of 16 liters/sec. What should be the throat diameter of the venturi tube to produce a pressure difference of 30 kPa? Note that the density and viscosity of water are p=996.95kg/ m u= 0.903x10-3Ns / m2 Are all conditions to obtain accurate estimation of water satisfied? Justify your answer. 2. Repeat Q1. for a rough-cast entrance cone and assuming a...
Question 3 (40 marks) (a) Air enters a horizontal nozzle with a velocity of 1 m/s,...
Question 3 (40 marks) (a) Air enters a horizontal nozzle with a velocity of 1 m/s, a pressure of 2 bar and a temperature of 350 K. At exit from nozzle, the air temperature is 450 K. The combined rate of specific heat transfers, and specific work transfers, w to the air as it passes through the nozzle is 150 kJ/kg. Assume that the air flow is steady and air can be treated as perfect gas with = 1005 J/(kg.K)....
help 2. (10 points) A stream of air (with unknown density p) from a 2 cm...
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2. (10 points) A stream of air (with unknown density p) from a 2 cm diameter nozzle strikes a curved vane as shown in the figure. A Pitot tube connected to a water-filled U-tube manometer is placed in the air jet. Calculate the force (horizontal and vertical) exerted in the vane by jet. Assume incompressible and inviscid flow. f Air Open -Stagnation Fixed vane Viet| tube D=2cm dia. LFree air jet 1 1 h=10cm 30° 2 Water V=Vjes
One day Daniel Bernoulli was sitting in a Starbucks sipping on a Venti Mocha Frappuccino. He...
One day Daniel Bernoulli was sitting in a Starbucks sipping on a Venti Mocha Frappuccino. He pondered some of the many applications of his newly developed principle. Grab a Starbucks of your own, and help him to answer the following questions. Assume air weighs 0.081 lb/ft3. 1. In a hurricane, roofs of structures are really lifted off, and not blown off, due to the decreased pressure as the wind blows over the roof. Determine the required wind speed to lift...
forencoskels QUESTION 6 [12 MARKS] 1. Calculate the power developed by the rotor of a horizontal...
forencoskels QUESTION 6 [12 MARKS] 1. Calculate the power developed by the rotor of a horizontal axis wind turbine blade of diameter 8 m. The wind upstream velocity is 15 m/s and download velocity is 5 m/s. [8] b. What is the mass flow rate of the air through the turbine rotors? Take the air density p=1.330 m /kg, N=0.6, Cp = (1+2)(1-22) and v) = V+V4 2 DIA
Question 3 (10 marks) What is the permeability of a vertical sand pack of length 1...
Question 3 (10 marks) What is the permeability of a vertical sand pack of length 1 m and radius 10 cm, displayed in the following Figure, where the top is exposed to atmospheric pressure and fluid density and viscosity are 1000 kg/m3 and 10 cP respectivelyThe flow rate of fluid is 1 cc/s. Show your calculation - Liquid P= 1 atm
Two components of a steam engine are shown in the figure below. The turbine is adiabatic. 2 boiler turbine m5 kg/s P 8.0 MPa 1-0 T2 300°C 2.5 m3/kg -0.06 MPa The properties of saturated water are giv...
Two components of a steam engine are shown in the figure below. The turbine is adiabatic. 2 boiler turbine m5 kg/s P 8.0 MPa 1-0 T2 300°C 2.5 m3/kg -0.06 MPa The properties of saturated water are given in Appendix 1. 1) Applying the first law of thermodynamics to the turbine, develop an expression for the power ou W. Justify all your assumptions and show all the steps of your calculation 2) What is the phase of the water at...
The figure shows a Venturi flow characterized by a a smooth contraction of the pipe diameter D, to a throat diameter D2. The Venturi flow meter is connected to a n-tube manometer at location A where the pipe diameter is D, and to the throat of the contraction at location E where the diameter is D2. Assuming that the density of the air inside the n-tube is negligible, use your knowledge on hydrostatics, continuity and Bernoulli equation to calculate the...
2(P1-P) B4) Where (1 mark) (iii) Based on relation 1 above, write an expression for the volume flow rate for the two cases: a) Ignoring losses (0.5 mark) b) Accounting for the losses at the obstruction (0.5 mark) (iv) The value of The value of C (coefficient of discharge) depends on both B and the Reynolds number. Discuss this statement considering various types of obstruction meters. (0.5 mark) (V) The flow rate of methanol at 20°C (p=788.4 kg/m3 and -5.857...
1. A machined entrance cone venturi to be installed into a 15-cm (inlet diameter) pipe, which transports a water flow of 16 liters/sec. What should be the throat diameter of the venturi tube to produce a pressure difference of 30 kPa? Note that the density and viscosity of water are p=996.95kg/ m u= 0.903x10-3Ns / m2 Are all conditions to obtain accurate estimation of water satisfied? Justify your answer. 2. Repeat Q1. for a rough-cast entrance cone and assuming a...
Question 3 (40 marks) (a) Air enters a horizontal nozzle with a velocity of 1 m/s, a pressure of 2 bar and a temperature of 350 K. At exit from nozzle, the air temperature is 450 K. The combined rate of specific heat transfers, and specific work transfers, w to the air as it passes through the nozzle is 150 kJ/kg. Assume that the air flow is steady and air can be treated as perfect gas with = 1005 J/(kg.K)....
help
2. (10 points) A stream of air (with unknown density p) from a 2 cm diameter nozzle strikes a curved vane as shown in the figure. A Pitot tube connected to a water-filled U-tube manometer is placed in the air jet. Calculate the force (horizontal and vertical) exerted in the vane by jet. Assume incompressible and inviscid flow. f Air Open -Stagnation Fixed vane Viet| tube D=2cm dia. LFree air jet 1 1 h=10cm 30° 2 Water V=Vjes
forencoskels QUESTION 6 [12 MARKS] 1. Calculate the power developed by the rotor of a horizontal axis wind turbine blade of diameter 8 m. The wind upstream velocity is 15 m/s and download velocity is 5 m/s. [8] b. What is the mass flow rate of the air through the turbine rotors? Take the air density p=1.330 m /kg, N=0.6, Cp = (1+2)(1-22) and v) = V+V4 2 DIA
Question 3 (10 marks) What is the permeability of a vertical sand pack of length 1 m and radius 10 cm, displayed in the following Figure, where the top is exposed to atmospheric pressure and fluid density and viscosity are 1000 kg/m3 and 10 cP respectivelyThe flow rate of fluid is 1 cc/s. Show your calculation - Liquid P= 1 atm
Two components of a steam engine are shown in the figure below. The turbine is adiabatic. 2 boiler turbine m5 kg/s P 8.0 MPa 1-0 T2 300°C 2.5 m3/kg -0.06 MPa The properties of saturated water are given in Appendix 1. 1) Applying the first law of thermodynamics to the turbine, develop an expression for the power ou W. Justify all your assumptions and show all the steps of your calculation 2) What is the phase of the water at...
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