World Languages

World Languages, 27.06.2019 20:00, sylviaangelinn

Safe opening of box without an exposed blade

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World Languages, 27.06.2019 20:00, gensevilla54

Safe opening of box without an exposed blade

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Physics, 30.08.2019 19:30, memester74

Aturbine blade 6.3 cm long with cross sectional area 4.6x10-4 m2 and perimeter 0.12 m is made of stainless steel (k=18 w/mk). the temperature of the root is 482oc. the blade is exposed to a hot gas flow at 871oc with a heat transfer coefficient 454 w/m2k. determine the temperature of the blade tip and the rate of heat transfer at the root of the blade. tip could be assumed to be insulated.

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Engineering, 08.11.2019 01:31, janeou17xn

Turbine blades mounted to a rotating disc in a gas turbine engine are exposed to a gas stream that is at tinfinity=1200 deg. c and maintains a convection coefficient of h=250w/m2k over the blade. the blades, which are fabricated from inconel, k=6*10-4 m2 and a perimeter of p=110mm. a proposed blade-cooling scheme, which involves routing air through the supporting disc, is able ot maintain the base of each blade at a temperature of tb=300 deg. c. a. if the maximum allowable blade temperature is 1050 deg. c and the blade tip may be assumed to be adiabatic, is the proposed cooling scheme satisfactory? b. for the proposed heating scheme, what is the rate at which heat is transferred from each blade to the coolant?

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