subject
Engineering, 20.09.2019 23:30 jhanes1983

As we learned in thermodynamics, heat engines run most effectively at higher temperature differences. the maximum temperature in the turbine unit operation is often limited by the turbine blade material. to keep turbine blades from melting, coolants like air or water or some other fluid are used within the blades and within the rotating base to remove heat from the blades. in this case, an iconel turbine blade has a length of 50 mm, a conductivity of 20 w/m∙k, a cross sectional area of 0.0006 m2, and a perimeter of 110 mm. the blade tip can be assumed to be adiabatic. the gas stream flowing over the blades has a temperature of 1200°c and a convection coefficient of 250 w/m2∙k. if the coolant can keep the base temperature of the blade at 300°c, will the blades stay at temperatures below 1050°c, the melting temperature of iconel?

ansver
Answers: 3

Other questions on the subject: Engineering

image
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
image
Engineering, 03.07.2019 14:10, kayabwaller4589
When at a point two solid phase changes to one solid phase on cooling then it is known as a) eutectoid point b) eutectic point c) peritectic point d) peritectoid point
Answers: 3
image
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
image
Engineering, 04.07.2019 18:10, lowkeyqueenk
Apipe with an outside diameter of 15 cm is exposed to an ambient air and surrounding temperature of -20°c. the pipe has an outer surface temperature of 65°c and an emissivity of 0.85. if the rate of heat loss from the pipe surface is 0.95 kw per meter of length, the external convective heat transfer coefficient (h) is: (a) 12.5 w/m"k (b) 18.6 w/mk (c) 23.7 w/mk (d) 27.9 w/mk (e) 33.5 w/mk
Answers: 1
You know the right answer?
As we learned in thermodynamics, heat engines run most effectively at higher temperature differences...

Questions in other subjects:

Konu
Mathematics, 30.11.2020 20:50
Konu
Engineering, 30.11.2020 20:50