Turbine blades mounted to a rotating disc in a gas turbine engine are exposed to a gas stream that is at . and maintains a convection coefficient of over the blade.
The blades, which are fabricated from Inconel, , have a length of L=50 mm. The blade profile has a uniform cross-sectional area of and a perimeter of P=110 mm.
A proposed blade-cooling scheme, which involves routing air through the supporting disc, is able to maintain the base of each blade at a temperature of .
a) If the maximum allowable blade temperature is and the blade tip may be assumed to be adiabatic, is the proposed cooling scheme satisfactory?
b) For the proposed cooling scheme, what is the rate at which heat is transferred from each blade to the coolant?
Schematic of turbine blade mounted to a rorating disc as follows:
Temperature distribution of a fin with an adiabatic tip as follows
Calculate the value of m as follows:
Calculate the value of T(L) as folows
As . The cooling scheme is satisfactory
We have the fin heat transfer rate as
When a cold drink is taken from a refrigerator, its temperature is 5 degree C. After 25 minutes in a 20 degree C room its temperature has increased to 10 degree C. What is the temperature of the drink after 50 minutes?
How many minutes are there in hours?
Find the answer for power .
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When the net force acting on an object is zero, the total momentum of the system will:
B)increase with time;
C)decrease with time;
D)None of these
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9 grams is how many milligrams?
How to write in scientific notation?