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NASA NTRS · 19670007346

Flutter analysis of flat rectangular panels based on three-dimensional supersonic unsteady potential flow

Cunningham, H. J.
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Abstract

Flutter analysis of flat rectangular panels based on three-dimensional supersonic unsteady potential flow

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UNSTEADY FLOWSUPERSONIC FLUTTERPANEL FLUTTERTHREE-DIMENSIONAL FLOWPOTENTIAL FLOW

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Cunningham, H. J.. 1967-02-01. Flutter analysis of flat rectangular panels based on three-dimensional supersonic unsteady potential flow. https://ntrs.nasa.gov/citations/19670007346

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NASA NTRS1966

Distributed Parameter Analysis of Pressure and Flow Disturbances in Rocket Propellant Feed Systems

A digital distributed parameter model for computing the dynamic response of propellant feed systems is formulated. The analytical approach used is an application of the wave-plan method of analyzing unsteady flow. Nonlinear effects are included. The model takes into account locally high compliances at the pump inlet and at the injector dome region. Examples of the calculated transient and steady-state periodic responses of a simple hypothetical propellant feed system to several types of disturbances are presented. Included are flow disturbances originating from longitudinal structural motion, gimbaling, throttling, and combustion-chamber coupling. The analytical method can be employed for analyzing developmental hardware and offers a flexible tool for the calculation of unsteady flow in these systems.

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