Investigation on Fluid Flow Characteristics of the Orifice in Nuclear Power Plant

Authors: Nam-Seok Kim, Sang-Kyu Lee, Byung-Soo Shin, O-Hyun Keum

Abstract:

The present paper represents a methodology for investigating flow characteristics near orifice plate by using a commercial computational fluid dynamics code. The flow characteristics near orifice plate which is located in the auxiliary feedwater system were modeled via three different levels of grid and four different types of Reynolds Averaged Navier-Stokes (RANS) equations with proper near-wall treatment. The results from CFD code were compared with experimental data in terms of differential pressure through the orifice plate. In this preliminary study, the Realizable k-ε and the Reynolds stress models with enhanced wall treatment were suitable to analyze flow characteristics near orifice plate, and the results had a good agreement with experimental data.

Keywords: Auxiliary Feedwater, Computational Fluid Dynamics, Orifice, Nuclear Power Plant

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1331787

References:

[1] General Requirements for Fluid Metering: Installation. USA: ASME PTC 19.5-72, 1972, pp. 179-181.
[2] Flow Conditioning and Meter Installation Requirements. USA: ASME PTC 19.5-2004, 2004, pp. 64-66.
[3] T. Jinyuan, H.Y. Guan, and L. Chaoqun, Computation Fluid Dynamics: A Practical Approach. USA: Butterworth-Heinemann, 2006, pp 35-37.
[4] Combustion Engineering Technology Cross Training Course Manual. USNRC
[5] Fluent Theory Guide, ANSYS Manual, 2006.