Browse > Article
http://dx.doi.org/10.5293/kfma.2017.20.1.021

Pre-swirl Nozzle Geometry Optimization to Increase Discharge Coefficient Using CFD Analysis  

Lee, Hyungyu (Department of Mechanical Engineering, Hanyang University)
Lee, Jungsoo (Department of Mechanical Engineering, Hanyang University)
Kim, Donghwa (Department of Mechanical Engineering, Hanyang University)
Cho, Jinsoo (Department of Mechanical Engineering, Hanyang University)
Publication Information
The KSFM Journal of Fluid Machinery / v.20, no.1, 2017 , pp. 21-28 More about this Journal
Abstract
Optimization process of pre-swirl nozzle geometry was conducted to improve the discharge coefficient of pre-swirl system by using CFD. The optimization of pre-swirl nozzle shape covered the converging angle and the location of the converging nozzle. Optimization process included Optimal Latin Hyper-cube Design method to get the experimental points and the Kriging method to create the response surface which gives candidate points. The process was finished when the difference between the predicted value and CFD value of candidate point was less than 0.1 %. This paper compared the Reference model, Initial model which is the first model of optimization and Optimized model to study flow characteristics. Finally, the discharge coefficient of Optimized model is improved about 17 % to the Reference model.
Keywords
Computational Fluid Dynamics; Cooling System; Discharge Coefficient; Gas Turbine; Optimization Process; Pre-swirler; Swirl Ratio;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Dittmann, M., Geis, T., Schramm, V., Kim, S., and Wittig, S., 2002, "Discharge Coefficients of a Preswirl System in Secondary Air Systems," ASME Journal of Turbomachinery, Vol. 124, pp. 119-124.   DOI
2 Javiya, U., Chew, J., and Hills, N., 2011, "A Comparative Study of Cascade Vanes and Drilled Nozzle Designs for Pre-Swirl," ASME Turbo Expo, Vancouver, British Columbia, Canada, GT-2011-4006.
3 Lewis, P., Wilson, M., Lock, G., and Owen, J. M., 2008, "Effect of Radial Location of Nozzles on Performance of Pre-Swirl Systems," ASME Turbo Expo, Berlin, Germany, GT-2008-50295.
4 Bricaud, C., Geis, T., Dullenkopf, K., and Bauer, H. J., 2007, "Measurement and Analysis of Aerodynamic and Thermodynamic Losses in Pre-Swirl System Arrangements," ASME Turbo Expo, Montreal, Canada, GT-2007-27191.
5 Chew, J. W., Ciampoli, F., Hills, N. J., and Scanlon, T., 2005, "Pre-Swirled Cooling Air Delivery System Performance," ASME Turbo Expo, Reno-Tahoe, Nevada, USA, GT-2005-68323.
6 Ciampoli, F., Chew, F. W., Shahpar, S., and Willocq, E., 2006, "Automatic Optimisation of Pre-Swirl Nozzle Design," ASME Turbo Expo, Barcelona, Spain, GT- 2006-90249.
7 Lewis, P., 2008, "Pre-swirl rotor-stator systems: Flow and heat transfer," PH. D. Thesis, Department of Mechanical Engineering, University of Bath.
8 Yan, Y., Gord, M. F., Lock, G. D., Wilson, M., and Owen, F. M., 2003, "Fluid Dynamics of a Pre-Swirl Rotor-Stator System," ASME Journal of Turbomachinery, Vol. 125, pp. 641-647.   DOI
9 Simpson, T., Mauery, T. M., Korte, J. J., and Mistree, F., 2001, "Kriging Models for Global Approximation in Simulation-based Multidisciplinary Design Optimization," AIAA Journal, Vol. 39, No. 12, pp. 2233-2241.   DOI
10 Seong, S., Murayama, M., and Yamamoto, K., 2005, "Efficient optimization design method using Kriging model," Journal of Aircraft, vol. 42, No. 2, pp. 413-420.   DOI
11 Ahmed, M. Y. M. and Qin, N., 2009, "Comparison of Response Surface and Kriging Surrogates in Aerodynamic Design Optimization of Hypersonic Spiked Blunt Bodies," ASAT-13.
12 Myers, R. H. and Montgomery, D. C., 2001, "Response Surface Methodology," Wiley Interscience Publication.
13 Benim, A. C., Cagan, M., Bonhoff, B., and Brillert, D., 2005, "Simulation of flow in Gas Turbine Pre-Swirl Systems with Emphasis on Rotor-Stator Interface Treatment," WSEAS int. Conf. on FLUID DYNAMICS & AERODYNAMICS, Corfu, Greece, pp. 206-211, August 20-22.
14 Cagan, M., Benim, A. C., and Gunes, D., 2009, "Computational Analysis of Gas Turbine Preswirl System Operation Characteristics," WSEAS TRANSACTIONS on FLUID MECHANICS, Issue 4, Vol. 4, pp. 117-126.
15 Feng, Z., Xinjun, W., Gaoliang, L., and Jun, L., 2015, "Computational fluid dynamics analysis for effect of length to diameter ratio of nozzles on performance of pre-swirl systems," Journal of POWER AND ENERGY, Vol. 229, No. 4, pp. 381-392.   DOI