Engineering, 26.03.2020 16:52 destinywashere101
Measurements of drag force are made on a model automobile in a towing tank filled with fresh water. The model length scale is 1/8 that of the prototype. Let FD = f(rho, V, L, μ).
a. State the conditions required to ensure a dynamic similarity between the model and prototype.
b. Determine the fraction of the prototype speed in the air at which the model test should be made in water to ensure dynamically similar conditions.
c. Measurements made at various speeds show that the dimensionless force ratio becomes constant at model test speeds above Vm = 6 m/s. The drag force measured during a test at this speed is FDm = 193 N. Calculate the drag force expected on the prototype vehicle operating at 97 km/hr in the air.
Answers: 3
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 18:10, anna22684
Water at 70°f and streams enter the mixing chamber at the same mass flow rate, determine the temperature and the quality of the exiting stream. 0 psia is heated in a chamber by mixing it with saturated water vapor at 20 psia. if both streams enters the mixing chamber at the same mass flow rate, determine the temperature and the quality of the existing system.
Answers: 2
Engineering, 04.07.2019 18:10, juansoto227711
Journeyman training is usually related (clo2) a)-to specific tasks b)-to cost analysis of maintenance task c)-to control process to ensure quality d)-to installation of machinery
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Measurements of drag force are made on a model automobile in a towing tank filled with fresh water....
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