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A multi bladed turbine disc can be assumed to have a combined mass of 150kg with an effective radius of gyration of 0.59m. The disc is rigidly attached to a steel shaft 2.4m long and, under service conditions, rotates at a speed of 250 rev/min. Determine the diameter of the shaft required in order that the maximum shear stress set up in the event of sudden seizure of the shaft shall not exceed 200 MN/m^2. Neglect the inertia of the shaft itself and take the modulus of rigidity G of the shaft material to be 85 GN/m^2.

A multi bladed turbine disc can be assumed to have a combined mass of 150kg with an effective radius of gyration of 0.59m. The disc is rigidly attached to a steel shaft 2.4m long and, under service conditions, rotates at a speed of 250 rev/min. Determine the diameter of the shaft required in order that the maximum shear stress set up in the event of sudden seizure of the shaft shall not exceed 200 MN/m^2. Neglect the inertia of the shaft itself and take the modulus of rigidity G of the shaft material to be 85 GN/m^2.

Elements Of Electromagnetics
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 multi bladed turbine disc can be assumed to have a combined mass of 150kg with an effective radius of gyration of 0.59m. The disc is rigidly attached to a steel shaft 2.4m long and, under service conditions, rotates at a speed of 250 rev/min. Determine the diameter of the shaft required in order that the maximum shear stress set up in the event of sudden seizure of the shaft shall not exceed 200 MN/m^2. Neglect the inertia of the shaft itself and take the modulus of rigidity G of the shaft material to be 85 GN/m^2.
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