436. Fluid Angular Momentum


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F H Wetmore: 436. Fluid Angular Momentum. 1964.



The object of this paper is to define angular momentum discuss a method of computing it, explain how it can be controlled, and present the role that the weight engineer can perform in the analysis. Angular momentum is the force produced by the circulation of a fluid about an axis in a closed loop system. This force will influence a space vehicle to rotate about an axis and therefore it must be controlled.
Equations are derived for the purpose of computing angular momentum. The location of the fluid with respect to the axis, the distance the fluid travels about an axis, the rate of flow of the fluid, the direction the fluid travels about the axis, and the acceleration due to gravity are then necessary parameters which are consider to derive the equations .
The techniques employed by the weight engineer with regards to weight, center of gravity and moment of inertia analysis are similar to the techniques require for the angular momentum analysis. It is therefore significant that the weight engineer is fully equipped to assume the responsibility of this analysis.
In view of the relationship that the control of angular momentum will have with the weight and center of gravity of the vehicle, it will be a valuable asset to a program if the weight engineer can satisfy the angular momentum criteria at a minimum weight.


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