Journal of Ocean Engineering and Technology (한국해양공학회지)

Korean Society of Ocean Engineers (한국해양공학회)
권호 표지
DOI QR코드

DOI QR Code

A Study on the Dynamic Loss Coefficients of Non-standard Fittings in Ship Exhaust Gas Pipes

  • Park, Seongjong (Ship & Offshore Research Center, Samsung Heavy Industries) ;
  • Park, Yonghwan (Ship & Offshore Research Center, Samsung Heavy Industries) ;
  • Kim, Bongjae (Ship & Offshore Research Center, Samsung Heavy Industries) ;
  • Choi, Jaewoong (Ship & Offshore Research Center, Samsung Heavy Industries)
  • Received : 2019.06.04
  • Accepted : 2019.10.16
  • Published : 2019.10.31
Download PDF
⟨ Previous Next ⟩

Abstract

As exhaust gas systems of ships become more complicated, it is necessary to calculate an accurate pressure loss at their design stage. If the dynamic loss coefficients of non-standard fittings mainly used in exhaust gas pipe (EGP) are well-documented, it would be possible to calculate precise pressure loss more readily than using the conventional method that analyzes the entire system. In the case of a ship's EGP, the flow rates and temperatures of exhaust gas are determined by engine specifications, and the range of the flow rate and temperature is limited according to operating conditions. In addition, as it is possible to define non-standard fittings frequently used in an EGP, a database can be easily constructed and effective. This paper illustrates effective parameters and analysis cases of several types of non-standard fittings mounted in ship EGPs. The analysis procedure proposed in this paper is verified using existing research results on HVAC fittings. The numerical procedure, which is minimally affected by manpower and grid, is established such that it can be applied at the industry level.

Keywords

References

  1. Ansys, 2009. Fluent 12.0 Documentation. Ansys Inc.
  2. Idelchik, I.E., 1993. Handbook of Hydraulic Resistance. 3rd Edition, Betelu House Inc.
  3. Kulkarni, D., Khairem, S., Idem, S., 2009. Measurements of Flat Oval Elbow Loss Coefficients (RP-1319). ASHRAE Transactions 115(1), 35-47.
  4. Liu, W., Long, Z., Chen, Q., 2012. A Procedure for Predicting Pressure Loss Coefficients of Duct Fittings Using CFD (RP-1493). HVAC&R Research, 18(6), 1168-1181.
  5. Mumma, S.A., Mahank, T.A., Ke, Y., 1998. Analytical Determination of Duct Fitting Loss-coefficients. Applied Energy, 61, 229-247. https://doi.org/10.1016/S0306-2619(98)00041-5
  6. Recknagel, H., Sprenger, E., Schramek, E., 1995. Taschenbuch fur Heizung und Klima Technik 94/95. Oldenbourg Industrieverla.
  7. Santos, A.P.P., Andrade, C.R., Zaparoli, E.l., 2014. CFD Prediction of the Round Elbow Fitting Loss Coefficient. International Scholarly Scientific Research & Innovation, 8(4), 743-747.
  8. Shao, L., Riffat, S.B., 1995. Accuracy of CFD for Predicting Pressure Losses in HVAC Duct Fittings. Applied Energy, 51(3), 233-248. https://doi.org/10.1016/0306-2619(95)00002-A
  9. Zmrhal, V., Schwarzer, J., 2009. Numerical Simulation of Local Loss Coefficients of Ventilation Duct Fittings. Proceedings of 11th International IBPSA Conference, Glasgow, Scotland, 1761-1766.