a) A diffuser is used to reduce the velocity of fluid by inducing a pressure change across the inlet and exit. Consider a situation where air enters an adiabatic diffuser steadily at 250 kPa, 300 °C and 145 m/s and leaves at 500 kPa and 50 m/s. The square duct connected to the inlet area has a side length of 8 cm. State the assumptions required Determine the rate of mass flowing through the diffuser (in kg/s) Determine the temperature of air when it leaves the diffuser (in °C) Determine the area of the diffuser at the outlet (in cm²) i. i. iii. iv.

a) A diffuser is used to reduce the velocity of fluid by inducing a pressure change across the inlet and exit. Consider a situation where air enters an adiabatic diffuser steadily at 250 kPa, 300 °C and 145 m/s and leaves at 500 kPa and 50 m/s. The square duct connected to the inlet area has a side length of 8 cm. State the assumptions required Determine the rate of mass flowing through the diffuser (in kg/s) Determine the temperature of air when it leaves the diffuser (in °C) Determine the area of the diffuser at the outlet (in cm²) i. i. iii. iv.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Similar questions

(Q3) Refrigerant-134a enters a compressor at 240 kPa and 70°C at a rate of 2.05 m³/s and leaves at a pressure of 1000 kPa. The refrigerant experiences a heat loss through the casing to the surrounding at a rate of 3 kJ/kg. The power input to the compressor is 640 kW. Determine (a) the mass flow rate of the refrigerant and (b) the exit temperature. R-134a
Consider a wind turbine that is situated in an area that has steady winds. The turbine rotates at 16 RPM. The mass flow rate through the turbine is 41,025 kg/s. The tip velocity is 260 km/hr. Take the air density to be 1.31 kg/m² and assume 180kW of electric power is generated by the turbine. Determine the following: a. Average velocity of the air b. The efficiency of the turbine c. Assuming winds are steady for 95% of the year, is this a suitable location for a wind turbine? Explain.
Air at 50 kPa, 100 °C and 5 m/s enters a pipe of diameter 14 cm and exits at 180 kPa and 400 °C. Assuming the air is heated as it flows through the pipe and that the diameter of the pipe is the same at both the inlet and outlet. Calculate: a. The volumetric flowrate of air at the inlet and exit of the pipe. b. The mass flowrate of air at the inlet and exit of the pipe. The rate at which heat is supplied to the system in kJ/s. с. Take the characteristic gas constant of air as 287 J/kg/K.
Steam enters a turbine through a duct with a diameter of 0.5 m at 10 MPa , 600 °, and 100 m/s. It exits the turbine through a duct with a diameter of 1 m at 400 kPa and 200 Part A For steady state operation, determine the exit velocity. Express the exit velocity in meters per second to three significant figures. ΑΣφ vec ? V2 = m/s Submit Request Answer Part B Determine the mass flow rate of steam through the turbine. Use the PC flow-state TESTcalc to obtain the density of steam at the inlet and exit ports. Express the exit velocity in kilograms per second to four significant figures. ΑΣφ več ? kg/s Submit Request Answer Part C What-if scenario: What is the exit velocity if the exit area is equal to the inlet area? Express the exit velocity in meters per second to six significant figures. ΑΣφ vec ? Submit Request Answer
A garden hose attached with a nozzle is used to fill a 22-gal bucket. The inner diameter of the hose is 1 in and it reduces to 0.5 in at the nozzle exit. If the average velocity in the hose is 7 ft/s, determine (a) the volume and mass flow rates of water through the hose, (b) how long it will take to fill the bucket with water, and (c) the average velocity of water at the nozzle exit.
As shown in the figure below, water behind a dam enters an intake pipe at a pressure of 24 psia and velocity of 5 ft/s, flows through a hydraulic turbine-generator, and exits at a point z₁ = 140ft below the intake at 19 psia, 45 ft/s, and a specific volume of 0.01602 ft³/lb. The diameter of the exit pipe is 5 ft and the local acceleration of gravity is 32.2 ft/s². Water Value = $i P₁ = 24 psia V₁ = 5 ft/s Z1 Dam /day Generatori Turbine H P2 = 19 psia 22=0.01602 ft³/lb V₂ = 45 ft/s = 5 ft Evaluating the electricity generated at 8.5 cents per kWh, determine the value of the power produced, in $/day, for operation at steady state and in the absence of internal irreversibilities. Water
A pick-up truck tailgate supports a crate where Wc= 150 lb. as shown in the figure. The tailgate weighs bf = 60 lb and is supported by two cables (only one is shown in the figure). Each cable has an effective cross sectional area Ac= 0.017 in. a. Find the tensile force and normal stress a in each cable. b. If each cable elongates 8= 0.01 in. due to the weight of both the crate and the tailgate, what is the average strain in the cable?"
An adiabatic steam turbine receives steam from two boilers. One flow has a mass flow rate (rim) of 5.7 kg/s at 3 MPa and 600 °C. The other flow has a mass flow rate (m) of 6.0 kg/s at 0.5 MPa and 600 °C. The exit flow is at 10 kPa with a quality of 100%. Neglect ΔΚΕ (Higure 1) Part A Determine the total power output. Express your answer to three significant figures. Vα ΑΣΦ vec ? MW Submit Request Answer Part B Provide Feedback Figure West