Q1: Air at 300 K and 50 kPa flows over a 2-m-square plate at a velocity of 70 m/s. The plate is maintained at a constant temperature of 350 K. Calculate the heat lost by the plate.
Q: Air at 20°C enters a heated circular tube with a diameter of 50 mm and a length of 3 m. The mass…
A: for answers apply heat balance equation.for solution refer below images.
Q: Use the thermal wind equation to explain the presence of the jet stream.
A: The Thermal Wind expression can be derived from the geopotential Equation as: Thermal wind is a…
Q: Air at 20°C, 1 atm flows with a velocity of 4.5 m/s over a flat plate having a sharp leading edge.…
A: Since we only answer up to 3 sub-parts, we’ll answer the first 3. Please resubmit the question and…
Q: Q3: Air at a temperature of 100°C with a pressure of 101kpa enters a constant area combustion…
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Q: Q.1. Air flows in a constant-area duct of diameter 1.5 cm with a velocity of 100 m/s, static…
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Q: Required information -0.5 where x Air flowing over a 1-m-long flat plate at a velocity of 7 m/s has…
A: To obtain the velocity gradient of air on the plate, we must first calculate the shear stress acting…
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A: The mass flow rate of the wind on a turbine is 43982.3125 kg/s.
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Q: O Prove that for isentropic flow of perfect gas the effects of an area change on the flow properties…
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Q: The velocity and temperature of the flow ahead of a normal shock wave are 1215 m/s and 300 K,…
A: Write the given data.
Q: At a point in an airflow the pressure, temperature, and velocity are 1 atm, 320 K, and 1000 m/s.…
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Q: Imagine a plate 1 m long by 1 m wide at a temperature of 80 °C. Water is passed over its surface at…
A: Length of the plate, L=1 mWidth of the plate, W=1 mTemperature of the plate, Ts=80oCSpeed of water,…
Q: Air enters a 12-m-long, 5-cm-diameter adiabatic duct at V1 = 70 m/s, T1 = 500 K, and P1 = 300 kPa.…
A: Given data: *The air length of the duct is L=12 m. *The diameter of the duct is d=5 cm. *The…
Q: Air is heated as it flows subsonically through a 10 cm × 10 cm square duct. The properties of air at…
A: Write the given data:
Q: Consider a normal shock wave in air where the upstream flow properties are u1 = 690 m/s, T1 = 288 K,…
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Q: A 4-m x 4-m flat plate maintained at a constant temperature of 80°C is subjected to parallel flow of…
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Q: Discussion: 4. Draw a figure between the air flowrate and the base temperature, then explain it. 5.…
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Q: In which medium does a sound wave travel faster: in cool air or in warm air?
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Q: Air with a velocity of 150 m/s enters a nozzle at a pressure of 200 kPa and temperature of 77 °C.…
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Q: An industrial gas at a pressure of 3.5 atm and 27°C blows over a 50-cm x 50-cm plate at an average…
A: Given Data The pressure of the gas, P=3.5 atm The temperature of the gas, T=27°C Constant wall…
Q: Q.2 Air which enters a diverging duct is slowed by a normal shock wave, as shown in figure. The…
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Q: A high-speed aircraft is cruising in still air. How does the temperature of air at the nose of the…
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A: The speed of the sound is calculated by using the expression written below: C=γ·R·TM Here, γ is the…
Q: Carbon dioxide flows steadily through a varying cross-sectional area duct such as a nozzle shown in…
A: Given,
Q: Does the Mach number of a gas flowing at a constant velocity remain constant? Explain.
A: The expression for the mach number is given by; Ma=vc ......(1) Here, v is the…
Q: Example 2: The local atmospheric pressure in Denver, Colorado (elevation 1610 m), is 83.4 kPa. Air…
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Q: Air is flowing in a 0.2-m-diameter pipe at a uniform velocity of 0.1 m/s. The temperature is 25°C…
A: Data given- D = 0.2 m V= 0.1 m/s T = 25°C P = 150 kPa
Q: An airplane is flying at a pressure altitude of 15 km with a velocity of 619 m/s. The outside air…
A: Given data: T=220 KV=619 m/sh=15 km Need to determine the pressure measured by the pitot tube.
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A: Given that initially, the carbon dioxide gas is quiescent or inactive. So, initial velocity (uo) is…
Q: a) The air temperature at the outlet: Response ° C b) The cross-sectional area at the outlet of the…
A: From the given data For air Cp=1.005 kJ/kg.KR=0.287 kJ/kg.Km˙= 6500 kghr=65003600kg sec P1=82…
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Q: In a geothermal power plant, the used geothermal water at 80°C enters a 15-cm-diameter and…
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Q: QUESTION 1 a) Discuss the difference between static and dynamic temperatures. b) Define the…
A: Answer a: Write the difference between the static and dynamic temperatures: Static temperature…
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Q: 8. A coal fired steam boiler uses 3000 kg of coal per hour. Air required for combustion is 15.5 kg…
A: Dear student, According to the expert guidelines I am allowed to answer only…
Q: Air at 200C and at a pressure of 1 bar is flowing over a flat plate at a velocity of 3 m/s. If the…
A: Given: Pressure P=1 bar, velocityV=3 m/s, palate is w=0.280 m wide , temperatures are T1=200°C and…
Q: 1. Determine the pressure acting on the upper and lower surfaces of a flat plate inclined at a 12°…
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Q: Air at 20°C enters a heated circular tube with a diameter of 30 mm and a length of 3 m. The mass…
A: for answers apply heat balance.for solution refer below images.
Q: Air at a pressure of 1 atm. abs. and 50°C flows parallel to the top surface of a rectangular plate,…
A:
Q: The local atmospheric pressure in Denver, Colorado (elevation 1610 m), is 83.4 kPa. Air at this…
A: The elevation of Denver, H = 1610 m The pressure in Denver, P = 83.4 kPa The atmospheric temperature…
Q: Determine the speed of sound in air at (a) 450 K and (b) 1400 K. Determine the Mach number (Ma) of…
A: Given: Air at 450K and 1000 K V=270 m/s TO determine: Speed of sound and Mach number
Q: ive hundred kilograms per hour of steam moves a turbine. The steam enters the turbine at 44 atm and…
A: Solution :- Given data :- mass flow rate m˙ =500 kg/hr =5003600…
Q: For a fixed compressor inlet velocity and flow area, explain the effect of increasing compressor…
A: Given Data⇒fixed compressor inlet velocityflow areaProblem statement⇒Problem says determine the…
Q: Specify the pipe required to carry 272.200 kg of steam per hr at 87.9 kg/cm^2 ga, 538 °C, with…
A: 87.9 kg/m^2 = 8620.045 kPa 272.200 kg/hr = mass flow rate = 0.0756111111 kg/s We know that P =…
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- Water flowing in a long, aluminum lube is to be heated by air flowing perpendicular to the exterior of the tube. The ID of the tube is 1.85 cm, and its OD is 2.3 cm. The mass flow rate of the water through the tube is 0.65kg/s, and the temperature of the water in the lube averages 30C. The free-stream velocity and ambient temperature of the air are 10m/sand120C, respectively. Estimate the overall heat transfer coefficient for the heat exchanger using appropriate correlations from previous chapters. State all your assumptions.Question No.15: a) Derive an expression for turbulent boundary layer thickness over a flat plate. b) The flow rates of hot and cold water streams running through a parallel flow heat exchanger are 0.2 kg/s and 0.5 kg/s respectively. The inlet temperatures on the hot and cold sides are 75°C and 25°C respectively. The exit temperature of hot water is 45°C. If the individual heat transfer coefficients on both sides are 650 W/m°C, calculate the area of the heat exchanger.Water (cp = 4182 J/Kg.K) at a flow rate of 5000 Kg/hr is heated from 10oC to 35oC in an oil cooler by engine oil (cp = 2072 J/Kg.K) with an inlet temperatureof 85oC and a flow rate of 6000 Kg/hr. Take the overall heat transfer coefficient to be 3500 W/m2.K. What are the areas required for:a. Parallel Flow.b. Counter Flow
- Heat transfers Air is to be heated from 15 C to 270 C, as it flows through a tube 25mm diameter at average velocity 30 m/s. The tube surface is maintained at 280 C and the air is to be provided at rate 0.013 kg/s. Take the water properties k=0.0336 W/m.C , υ = 25.9× 10-6 m2/s , Cp=1.014 kJ/kg.C , ρ = 0.8826 kg/ m3 , Pr=0.689 . Determine the following The necessary tube length Heat transfer coefficient Heat transfer rateHot fluid enters at a flow rate of 3 kg/sec with an inlet temperature of 150 C while cold fluid enters 5 kg/sec and with an inlet temperature of 60 C. Determine the maximum heat transfer that can happen during the heat exchange process? Take specific heat value of the fluid as 2000 J/(kgC) not sufficient information 150 kW 1 MW 540 kW none of the given 900 kWIn a countercurrent double-pipe heat exchanger, the hot oil entering the inner tube at 420 K with a flow rate of 60 g/s is required to be cooled to 320 K. In the space between the outer tube and the inner tube of the heat exchanger, cooling water flows at the same linear speed as the oil. Cooling water enters the heat exchanger at 290 K. The inner tube inner diameter of the heat exchanger is 25 mm and the outer tube inner diameter is 40 mm. Calculate the length of the heat exchanger. The oil side heat transfer coefficient is 1.6 kW/m2 K, and the water side heat transfer coefficient is 3.6 kW/m2 K. The densities of oil and water can be taken as 0.8 and 1.0 g/cm3, respectively, and the specific heats of oil and water can be taken as 2.0 and 4.2 kJ/kg K, respectively. Wall effects can be neglected. Flow cross-sectional area = (PI)*D2 /4 F2
- Furnace walls are lined by 3 layers: firebrick with a thickness of 6 in (k=0.95 Btu/h.ft. F), insulating brick (k-0.4 Btu/h.ft.°F) and common brick (k=0.8 Btu /h.ft.°F) Firebrick inlet temperature, T₁ = 1800°F, maximum insulating brick temperature, T₂ = 1720°F and T3 = 280°F. 1. Calculate the thickness of the insulating brick layer. 2. If the common brick is 9 in, calculate the exit temperature.1) Atmospheric air at 25oC and with a speed of 50 m/s is pumped by a fan over a flat plate. a)What is the minimum plate length in order to achieve a Reynolds number of 108 ? b)At what distance from the leading edge would transition occur if critical Re #= 5x105 ? 2) Local Nusselt number is given as Nux=0.04Rex0.9 Pr 1/3. Obtain an expression for, a) average heat transfer coefficient, x b) local heat transfer coefficient, hx c) What is the ratio of the average to local coefficient, x / hx 3) Air is in parallel flow over a flat heater surface which is to be maintained at 140oC. Airflow induces a drag force of 0.25 N on the heater. What is the electrical power needed to maintain the prescribed surface temperature? 4) Air at 1 atm with a velocity of 4 m/s and a temperature of 50oC flows over a flat plate that is at a uniform temperature of 100oC. The plate has a length of 0.20 m and a width of 0.1 m. a) What is the average heat…Using EES (or other) software, investigate the effect of the exhaust gas inlet temperature on the rate of heat transfer, the exit temperature of exhaust gases, and the rate of evaporation of water. Let the temperature of exhaust gases vary from 300°C to 600°C. Plot the rate of heat transfer, the exit temperature of exhaust gases, and the rate of evaporation of water as a function of the temperature of the exhaust gases, and discuss the results.
- Hot water flowing at 0.015 m3/min enters the tube side of a counter current shell & tube heat exchanger at 80 C and leaves at 50 C. Cold oil flowing thru the shell at 0.05 m3/min, with density 800 kg/m3 and specific heat of 2.0 kJ/kg K, enters at 20 C. Consider water specific heat at 4.2 kJ/kg K and density of 988 kg/m3 at above condition, what is the approximate Log Mean Temperature Difference (LMTD)? Show the temperature profile completely labeled.Engine oil at 20°C is to be heated to a temperature of 60°C by saturated steam at 1 atm in a double-pipe heat exchanger. The inner and outer diameters of the annular space are 4 cm and 6 cm, respectively, and engine oil enters the inner tube with a mean velocity of 0.8 m/s. The inner tube surface may be assumed to be isothermal at 100°C, and the outer tube is well insulated. Assuming fully developed Poiseulle flow for oil, determine the rate of heat transfer to the oil from the tube surface and find the tube length required to heat the oil to the indicated temperature using the empirical relations associated with convection heat transfer.