A steel shaft of 20 cm diameter is subjected to heat treatment in a furnace at 927°C and with a convection coefficient of 80 W/m 2 – k. The initial temperature of the shaft is 27°C. Find the time consumed in achieving a center line temperature of 627°C. Take : = 7854 kg/m 3 , k = 48.8 W/m – k, cp = 559 J/kg – K for shaft material.
A steel shaft of 20 cm diameter is subjected to heat treatment in a furnace at 927°C and with a convection coefficient of 80 W/m 2 – k. The initial temperature of the shaft is 27°C. Find the time consumed in achieving a center line temperature of 627°C. Take : = 7854 kg/m 3 , k = 48.8 W/m – k, cp = 559 J/kg – K for shaft material.
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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A steel shaft of 20 cm diameter is subjected to heat treatment in a furnace at 927°C and
with a convection coefficient of 80 W/m
2
– k. The initial temperature of the shaft is 27°C.
Find the time consumed in achieving a center line temperature of 627°C. Take :
= 7854 kg/m
3
, k = 48.8 W/m – k, cp = 559 J/kg – K for shaft material.
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