Engineering, 07.03.2020 05:22, beccca16
The air-handling system for a large indoor sky diving (vertical) wind tunnel has a fan at the inlet (bottom), and a test section (where the users fly) with a circular crosssection of 5.5 m diameter. The designers want to achieve a 200 km/hr wind speed, with the air in the test-section nominally at 22 ÂșC and 1.0 bar. How much air (mass flow rate) will the fan that runs the wind tunnel have to supply to meet these conditions? If the pressure of the air at the exit of the wind tunnel is 0.2 psi lower than the pressure in the test section, what would be the air velocity at the exit, assuming the air temperature remained at 22 ÂșC?
Answers: 2
Engineering, 04.07.2019 18:10, tjeffers90028
Refrigerant 134a enters an insulated compressor operating at steady state as saturated vapor at -26°c with a volumetric flow rate of 0.18 m3/s. refrigerant exits at 9 bar, 70°c. changes in kinetic and potential energy from inlet to exit can be ignored. determine the volumetric flow rate at the exit, in m3/s, and the compressor power, in kw.
Answers: 1
Engineering, 04.07.2019 19:20, horsedoggal1234
Consider airflow over a flat plate of length l = 1.5 m under conditions for which transition occurs at le = 0.9 m based on the critical reynolds number, re, e = 5 x 10. evaluating the thermophysical properties of air at 400 k, determine the air velocity. (hint: use the tables to find the properties of air)
Answers: 3
Engineering, 05.07.2019 10:10, johns2380
What is the correct way to measure the overall length of a boat? measure from the tip of the bow to the highest point on the gunwale. measure from the tip of the bow in a straight line to the stern of the boat. measure from the tip of the bow in a straight line to the back seat. measure from port to starboard at the boat's widest point.
Answers: 1
Engineering, 06.07.2019 03:20, mardell2587
Acountershaft is supported by two tapered roller bearings using indirect mounting. the radial bearing loads are 1120 lb for the left-hand bearing and 2190 lb for the right-hand bearing. the shaft rotates at 400 rpm and is to have an l10 life of 40,000 hours and an application factor of 1.4. assume ka2k 15, and find the required radial rating of each bearing
Answers: 3
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