Dynamics and stability of a cylindrical shell subjected to annular flow including temperature effects

Abstract

Considering thermal loads, dynamics and stability of an outer cylindrical shell conveying swirling fluid in the annulus between the inner shell-type body and the outer shell are investigated by the travelling wave approach. Shell motions are considered based on Donnell-type shell theory. The fluid forces are described by means of the potential flow theory, and thermal loads are determined by the thermo-elastic theory. The numerical analyses are conducted by a zero-level contour method. The study shows the effects of annular gaps and boundary conditions on stability of shells. The influences of angular flow on the critical axial velocity and axial flow on the critical annular velocity are discussed. Moreover, the thermal loads decrease the critical flow velocity markedly and the critical temperature rise is found.

Effects of Geometric Parameters on Dynamic Stability of the Annular Flow-shell System

“…The stator can subjected to annular flow is studied only due to lacking for supporters resulting from instability easier. The present study is a continuation of the previous theoretical work [15], which aims to investigate the influence of geometric parameters on the dynamic stability of shells conveying fluid. The effects of different boundaries on the stability of shells are compared.…”

“…Based on the classic Donnell shell motions [15], the motion equations of an inner or outer presressed shell incorporating axial loads can be written in one linear matrix operator:…”

Theoretical and experimental research of thin-walled structures interacting with viscous fluid

“…Исследование коаксиальных оболочек, содержащих идеальную или вязкую жидкость, текущую только в кольцевом канале, в том числе с учётом влияния температурных эффектов, представлено в работах [23][24][25].…”