Zhu Wang
Exa Corporation, USA
Kristian Tuszynski
Modelon AB, Ideon Science Park, Lund, Sweden
Ideon Science Park, Lund, Sweden
Hubertus Tummescheit
Modelon AB, Ideon Science Park, Lund, Sweden
Ales Alajbegovic
Exa Corporation, USA
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http://dx.doi.org/10.3384/ecp09430098Published in: Proceedings of the 7th International Modelica Conference; Como; Italy; 20-22 September 2009
Linköping Electronic Conference Proceedings 43:46, p. 413-422
Published: 2009-12-29
ISBN: 978-91-7393-513-5
ISSN: 1650-3686 (print), 1650-3740 (online)
Presented is a model for the simulation of the interaction between the airflow and the AC-system. Demonstrated is 1) a successful coupling of flow solver (PowerFLOW 4.1) with the Modelica-based Dymola system tool and the AirConditioning Library; making use of the previously validated underhood-environment; and 2) the importance of a careful
design of the underhood flow for the AC-system performance. The validity of the developed simulation capability is tested by successful comparison with the available experimental data for the condenser at the given operating conditions. Shown is the potential for the analysis of the flow details and structures affecting the condenser performance like airflow recirculation.
[1] K. Srinivasan; Z.J. Wang; W. Yuan; R. Sun; “Vehicle thermal management simulation using a rapid omni-tree based adaptive Cartesian mesh generation methodology;” HTFED2004-56748; 204 ASME Heat Transfer/Fluids Engineering Summer Conference; July 11-15; Charlotte; North Carolina; USA.
[2] B. Uhl; F. Brotz; J. Fauser; U. Krueger; “Development of engine cooling systems by coupling CFD simulation and heat exchanger analysis programs;” SAE 2001-01-1695.
[3] G. Seider; F. Bet; T. Heid; U. Hess; T. Klein; and J. Sauer; “A numerical simulation strategy for complex automotive cooling systems;“ SAE 2001-01-1722.
[4] H. Knaus; C. Ottosson; F. Brotz; W. Kuehnel; ”Cooling module performance investigation by means of underhood simulation;“ SAE 2005-01-2013.
[5] T.P. Nobel; S.K. Jain; “A multidimensional approach to truck underhood thermal management;” SAE 2001-02-2785.
[6] C.L.R.Siqueira; P. Vatavuk; M. Jokuszies; M.R. Lima; “Numerical simulation of a truck underhood flow;” SAE 2002-01-3453.
[7] E.A. Costa; “CFD approach on underhood thermal management of passenger cars and trucks;” SAE 2003-01-3577.
[8] F. Fortunato; F. Damiano; L. Di Matteo; P.Oliva; “Underhood cooling simulation for development of new vehicles;” SAE 2005-01-2046.
[9] A. Alajbegovic; R. Sengupta; W. Jansen: "Cooling Airflow Simulation for Passenger Cars using Detailed Underhood Geometry;" SAE 2006-01-3478; SAE Conference; Chicago; October 2006
[10] B. Xu; A. Konstantinov; J. Amodeo; W. Jansen; A. Alajbegovic; "Simulation of Cooling Airflow under Different Driving Conditions;" SAE 2007-01-0766; SAE World Congress; Detroit; April 2007
[11] S. Brémont; G. Servera; E. Fares; J. Abanto; A. Alajbegovic: "Experimental Investigation and Numerical Validation of Cooling Airflows of a Realistic Vehicle;" 6th FKFS Conference; Stuttgart; Germany; October 2007
[12] U. Frisch; B. Hasslacher; and Y. Pomeneau; “Lattice gas automata for the Navier-Stokes equation;” Physical Review Letters; 56:1505-1508; 1986.
[13] S. Chen and G. D. Doolen; “Lattice Boltzmann method for fluid flows”; Annual Review of Fluid Mechanics; 30:329-364; 1998.
[14] S. Succi; The Lattice Boltzmann Equation for Fluid Dynamics and Beyond; Series Numerical Mathematics and Scientific Computation; Clarendon Press; Oxford; 2001.
[15] D. d’Humieres; P. Lallemand and Y. H. Quian; “Lattice BGK models for Navier-Stokes equations;” Europhysics Letters; 17(6):479-484; 1992.
[16] V. Yakhot; and S.A.; Orszag; “Renormalization Group Analysis of Turbulence. I. Basic Theory” J. Sci. Comput.; 1(2); 3-51; 1986.
[17] V. Yakhot; V.; S.A. Orszag; S. Thangam; T. Gatski; and C. Speziale; “Development of turbulence models for shear flows by a double expansion technique;” Phys. Fluids A; 4 (7); 1510-1520; 1992.
[18] H. Chen; S.A. Orszag; I. Staroselsky; and S. Succi; “Expanded Analogy between Boltzmann Kinetic Theory of Fluid and Turbulence”; J. Fluid Mech.; 519: 307-314; 2004.
[19] H. Chen; “H-theorem and generalized semidetailed balance conditions for lattice gas systems;” J. Stat. Phys. 81:347-359; 1995.
[20] H. Chen and C. Teixeira; “H-Theorem and origins of instability in thermal lattice Boltzmann models;” Comp. Phys. Communication; 129:21-31; 2000.
[21] H. Chen and R. Zhang; ”Lattice Boltzmann method for simulations of liquid-vapor thermal flows;” Phys. Rev. E67(6): Art. no. 066711 Part 2; 2003.
[22] C. M. Teixeira; “Incorporating turbulence models into the lattice-Boltzmann method;” Int. J. Modern Physics C; 9(8):1159-1175; 1998.
[23] PowerFLOW User’s Guide; Release 4.1; Exa Corporation; Boston; Massachusetts; 2007.
[24] Dymola User’s Guide; Release 7.2; Dynasim AB; Lund; Sweden; 2009.
[25] www.Modelica.org; accessed August 2009
[26] S.E.; Mattsson; H. Elmqvist; M. Otter; “Physical system modeling with Modelica;” Control Engineering Practice; 6; 501-510; 1998.
[27] D. Limperich; M. Braun; G.; Schmitz; and K. Prölß; “System Simulation of Automotive Refrigeration Cycles;” 4th International Modelica Conference; Hamburg; 2005.
[28] H. Tummescheit and D. Limperich; “The AirConditioning library for simulation of advanced vehicle A/C systems;” VTMS8: Vehicle Thermal Management Systems Conference & Exhibition; Nottingham; 2007.
