Engineering, 06.10.2019 09:02 ninaaforever
Acomposite wall separates combustion gases at 2300◦c from a liquid coolant at 70◦c, with gas and liquid-side convection coefficients of 20 and 800 w/m2 ·k. the wall is composed of a 15 mm-thick layer of beryllium oxide on the gas side, and a 25 mm-thick slab of stainless steel (aisi 304) on the liquid side. the contact resistance between the oxide and the steel is 0.05 m2 ·k/w. what is the rate of heat loss per unit surface area of the composite wall? find all intermediate surface temperatures and sketch the temperature distribution from the gas to the liquid. calculate the overall heat transfer coefficient.
Answers: 2
Engineering, 03.07.2019 14:10, cowgyrlup124
Explain the difference laminar and turbulent flow. explain it with the shear stress and the velocity profiles.
Answers: 1
Engineering, 03.07.2019 15:10, EmilySerna
Heat is added to a piston-cylinder device filled with 2 kg of air to raise its temperature 400 c from an initial temperature of t1 27 cand pressure of pi 1 mpa. the process is isobaric process. find a)-the final pressure p2 b)-the heat transfer to the air.
Answers: 1
Engineering, 04.07.2019 18:10, ahmedeldyame
Aloaded platform of total mass 500 kg is supported by a dashpot and by a set of springs of effective stiffness 72 kn/m. it is observed that when the platform is depressed through a distance x = 12.5 cm below its equilibrium position and then released without any initial velocity; it reaches its equilibrium position in the shortest possible time without overshoot. find the position and velocity of the loaded platform 0.10 sec. after its release. if a further load of 400 kg is added to the platform, find, i) the frequency of damped vibrations, and i) the amplitude of vibration after 2 complete oscillations, given that the initial amplitude is 15 cm.
Answers: 1
Engineering, 04.07.2019 18:10, ayoismeisjjjjuan
Manometers are good examples of measuring instruments, nowadays they are not as common as before. a)-capacitive probe gauges b)-gravitational gauges deformation ) gauges d)-digital gauges
Answers: 1
Acomposite wall separates combustion gases at 2300◦c from a liquid coolant at 70◦c, with gas and liq...
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