Analysis of Fluid Structure Interaction in High Pressure Elbow Pipe Connections

Abstract:

Pipes in power plants generally subjected to high pressures and temperatures. These are connected by elbow, T-joints to get the continuity between different stages. Due to excessive joints the outlet velocity and pressure will drops by considerable amount. Stresses will be produced due to high pressure and temperature of fluid flow, which in turn creates the failure of the pipes. The turbulence of the fluid passing through the pipes will also plays a vital role to decide the outlet pressure and velocity. In this present study pipes are connected by the elbow joint are considered and observed the effect of pipe thickness, turbulence intensity and length of elbow on outlet pressure, velocity, von mises stress and turbulence kinetic energy. It results that with increase in pipe thickness and length of elbow, the velocity, von mises stress and turbulence kinetic energy are decreases but with increase in turbulence intensity, the velocity and turbulence kinetic energy are increases.

• Periodical: Applied Mechanics and Materials (Volumes 813-814)
• Pages: 1075-1079
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.813-814.1075
• Online since: November 2015
• Authors: Janjanam Naveen, A. Eswara Kumar*, M. Nagaraju
• Keywords: Ansys (CFX), Elbow, Fluid Structure Interaction, Turbulence Intensity, Turbulence Kinetic Energy, Von Mises Stress

References

[1] Carneiro. J. O, de melo F.J. Q, Rodrigues J.F. D, The modal analysis of a pipe elbow with realistic boundary conditions, Journal of pressure vessels and piping, 2005, pp.593-601.

DOI: 10.1016/j.ijpvp.2005.04.001

[2] Srinath Gudur, Fatigue ratchering analysis of a pressurized elbow, International journal of recent advances in mechanical engineering, Vol. 2, N0. 3 Aug (2013).

[3] Thiagarajan. N, Djananjay. R and Shakti Prasad, Stiffness of pipe elbow, International conference on mechanical, production and automobile engineering, Dec (2011).

[4] Junhua Dong, Xiangfu Bao, Xize Zheng, Comparison of two methods of finite element modeling for elbows with unequal wall thickness, International conference on medical physics and biomedical engineering, 2012, pp.498-504.

DOI: 10.1016/j.phpro.2012.05.095

[5] Amaron ayob, stress analysis of piping elbows using FEM, Journal institute of engineers, Malaysia, Vol. 64.

[6] Xu W W, Wu D Z and wang L Q, "coupling analysis of fluid structure interaction in fluid filled elbow pipe connection:, IOP conference series earth and environmental science, (2012).

DOI: 10.1088/1755-1315/15/6/062001

[7] Thiagarajan. N, Estimation of pipe elbow anchor loads due to internal pressure", International journal of engineering and innovation technology, Vol. 2, Issue 7, (2013).

[8] Pranchi N. Tambe, dhande K. K, Jamadar N. I, Flexibility and Stress Analysis of Piping System using CAESAR II- Case Study, international journal of engineering research and technology, Vol. 3, Issue 6, June (2014).