Surge control of axial flow compression systems via linear and nonlinear designs

2002 ◽  
Author(s):  
Der-Cherng Liaw ◽  
Sing-Ming Ren ◽  
Wen-ChingChung ◽  
E.H. Abed
Keyword(s):  
Axial Flow ◽  
Surge Control ◽  
Linear And Nonlinear ◽  
Flow Compression

LINEAR AND NONLINEAR DYNAMICS OF CANTILEVERED CYLINDERS IN AXIAL FLOW. PART 3: NONLINEAR DYNAMICS

2002 ◽  
Vol 16 (6) ◽  
pp. 739-759 ◽  
Author(s):  
C. SEMLER ◽  
J.L. LOPES ◽  
N. AUGU ◽  
M.P. PAÏDOUSSIS
Keyword(s):  
Nonlinear Dynamics ◽  
Axial Flow ◽  
Flow Part ◽  
Linear And Nonlinear

Linear and Nonlinear Dynamics of Cantilevered Cylinders in Axial Flow

2014 ◽  
Author(s):  
Ahmad Jamal ◽  
Michael P. Païdoussis ◽  
Luc G. Mongeau
Keyword(s):  
Equations Of Motion ◽  
Axial Flow ◽  
Experimental System ◽  
Vital Role ◽  
Viscous Force ◽  
Flexible Cylinder ◽  
Force Coefficients ◽  
Precise Calculation ◽  
Linear And Nonlinear ◽  
Nonlinear Equations Of Motion

Understanding and prediction of the dynamics of slender flexible cylinders in axial flow is of interest for the design and safe operation of heat exchangers and nuclear reactors, specifically that of heat exchanger tubes, nuclear fuel elements, control rods, and monitoring tubes. In such fluid-structure interaction problems, the fluid forces acting on the flexible structure play a vital role in defining its dynamics. Therefore, a precise calculation of the coefficients associated to these forces, such as the longitudinal and normal viscous force coefficients, and base drag coefficient in the equation of motion is imperative. The present work is aimed at (i) calculating these force coefficients for a cantilevered slender flexible cylinder, fitted with an ogival end-piece, in axial flow and (ii) conducting experiments on the same system. In the calculation of these force coefficients, the parameters of the experimental system are used, so that the theoretically predicted dynamics would be representative of the actual physical system. These calculated force coefficients are then incorporated in the linear and nonlinear equations of motion and the predicted dynamics are compared with those of the experiments. The comparison shows good agreement between the theoretical and experimental results.

Linear and nonlinear development of m=0 instability in a diffuse Bennett Z-pinch equilibrium with sheared axial flow

2010 ◽  
Vol 17 (7) ◽  
pp. 072107 ◽  
Author(s):  
I. Paraschiv ◽  
B. S. Bauer ◽  
I. R. Lindemuth ◽  
V. Makhin
Keyword(s):  
Axial Flow ◽  
Nonlinear Development ◽  
Linear And Nonlinear ◽  
Z Pinch

Fixed-order dynamic compensation for axial flow compression systems

2002 ◽  
Vol 10 (5) ◽  
pp. 727-734 ◽  
Author(s):  
W.M. Haddad ◽  
J.R. Corrado ◽  
A. Leonessa
Keyword(s):  
Axial Flow ◽  
Dynamic Compensation ◽  
Fixed Order ◽  
Flow Compression

LINEAR AND NONLINEAR DYNAMICS OF CANTILEVERED CYLINDERS IN AXIAL FLOW. PART 1: PHYSICAL DYNAMICS

2002 ◽  
Vol 16 (6) ◽  
pp. 691-713 ◽  
Author(s):  
M.P. PAÏDOUSSIS ◽  
E. GRINEVICH ◽  
D. ADAMOVIC ◽  
C. SEMLER
Keyword(s):  
Nonlinear Dynamics ◽  
Axial Flow ◽  
Flow Part ◽  
Linear And Nonlinear

Analysis and Control of Multi-Mode Axial Flow Compression System Models1

1999 ◽  
Vol 122 (3) ◽  
pp. 393-401 ◽  
Author(s):  
MingQing Xiao ◽  
Tamer Bas¸ar
Keyword(s):  
Closed Loop ◽  
Controller Design ◽  
Axial Flow ◽  
Pressure Rise ◽  
Open Loop ◽  
Rotating Stall ◽  
Flow Compression ◽  
The Right ◽  
And Control ◽  
Multi Mode

The paper studies the behavior of multi-mode systems of the Moore-Greitzer model. Its main result is the existence of a parameterized nonlinear state feedback controller which stabilizes the system to the right of the peak of the compressor characteristic. In this process, a rotating stall envelope surface is discovered, and it is shown that the controller design achieves the tasks of preventing the closed-loop system from entering either rotating stall or surge, and making the closed-loop pressure rise coefficient be able to approach its maximum. Numerical simulations of the open-loop and closed-loop models are presented to illustrate the analysis and the results. [S0022-0434(00)00803-0]

Fuzzy Controller in the Application for Anti-Surge of the Axial-Flow Compressor

2011 ◽  
Vol 55-57 ◽  
pp. 73-76
Author(s):  
Wei Zhao ◽  
Wen Juan Huang ◽  
Yu Liang Chen ◽  
Jing Xia Niu
Keyword(s):  
Control System ◽  
Fuzzy Control ◽  
Control Theory ◽  
Fuzzy Controller ◽  
Axial Flow ◽  
Axial Flow Compressor ◽  
Surge Control ◽  
Flow Compressor

The paper introduces the surge phenomenon of the axial-flow compressor. To ensure the blower running safely, we analyze the surge phenomenon and design a anti-surge control system by using the fuzzy control theory to control the position of the snorting valve. The result of simulation in Matlab proves that the fuzzy controller is feasible.

Surge-Induced Structural Loads in Gas Turbines

1980 ◽  
Vol 102 (1) ◽  
pp. 162-168 ◽  
Author(s):  
R. S. Mazzawy
Keyword(s):  
Gas Turbines ◽  
Pressure Ratio ◽  
Axial Flow ◽  
Turbine Engine ◽  
Compression System ◽  
Engine Design ◽  
Steady State Levels ◽  
Flow Compression ◽  
Engine Components ◽  
Bypass Ratio

The axial flow compression system of a modern gas turbine engine normally delivers a large quantity of airflow at relatively high velocity. The sudden stoppage (and reversal) of this flow when an engine surges can result in structural loads in excess of steady state levels. These loads can be quite complex due to inherent asymmetry in the surge event. The increasing requirements for lighter weight engine structures, coupled with the higher pressure ratio cycles required for minimizing fuel consumption, make the accurate prediction of these loads an important part of the engine design process. This paper is aimed toward explaining the fluid mechanics of the surge phenomenon and its impact on engine structures. It offers relatively simple models for estimating surge-induced loads on various engine components. The basis for these models is an empirical correlation of surge-induced inlet overpressure based on engine pressure ratio and bypass ratio. An approximate estimate of the post-surge axial pressure distribution can be derived from this correlation by assuming that surge initiation occurs in the rear of the compression system.

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