Prediction of cavitation inside mini-sac Diesel injector nozzle using computational fluid dynamics

• Autorzy: Bansode Vaibhav , Verma Munna , Pandhare Amar , Shinde Sandip

Identyfikatory

DOI

10.30464/jmee.2022.6.1.7

• Języki publikacji: EN

Abstrakty

EN

The performance of the internal flow of the fuel injector is impeded by several factors. The nozzle is one of the factors, being typically about a millimeter long and a fraction of a millimeter in diameter. Cavitation inside the diesel injector nozzle is associated with local pressure distribution. At flow areas with sharp corners, the pressure may locally drop below vapour pressure. The aim of this study is to assess the impact of turbulence and cavitation models on the prediction of flow in diesel injection nozzle. In the present study, an analysis of an existing 6 hole mini-sac diesel injector nozzle is carried out using a CFD package. The main objective of the research is to design a nozzle to avoid cavitation and to find out the contribution of different parameters through parametric study. Cavitation is a complex phenomenon whose appearance depends on the physical as well as flow properties of the flowing substance. Thus, for a better visualization of cavitation, a 3D CFD simulation of mini-sac injector nozzle is carried out. An analysis of a single nozzle hole of a mini-sac diesel injector nozzle is considered for the analysis, as the flow is uniformly distributed through each nozzle. As the three-dimensional geometry of mini-sac nozzle is complicated, therefore tet/hybrid element with T-Grid meshing scheme is used, for good surface meshing. The analysis is carried out at injection pressure of 5 00 bar. The CFDresults are validated against test data with the maximum deviation for the mass flow rate of 8.67% at full needle lift.

Słowa kluczowe

EN

cavitations; mini-sac diesel injector nozzle; needle lift; parametric study; CFD; computational fluid dynamics

PL

kawitacja; dysza wtryskiwacza; badania parametryczne; CFD; obliczeniowa dynamika płynów

• Wydawca: Wydawnictwo Uczelniane Politechniki Koszalińskiej
• Czasopismo: Journal of Mechanical and Energy Engineering
• Rocznik: 2022
• Tom: Vol. 6, No 1
• Strony: 7--12
• Opis fizyczny: Bibliogr. 18 poz., rys., tab., wykr.

Twórcy

autor

Bansode Vaibhav

• Mechanical Engineering Department, STES’s Smt. Kashibai Navale College of Engineering, Pune-41, Maharashtra, India

autor

Verma Munna

• Mechanical Engineering Department, Bhagwant University, Ajmer, Rajasthan, India

autor

Pandhare Amar

• Mechanical Engineering Department, STES’s Sinhgad College of Engineering, Pune-41, Maharashtra, India

autor

Shinde Sandip

• Mechanical Engineering Department, STES’s Smt. Kashibai Navale College of Engineering, Pune-41, Maharashtra, India

Bibliografia

• 1. Sergey Martynov “Numerical simulation of cavitation process in diesel injectors”, PhD Thesis, University of Brighton, 2005.
• 2. M. Gavaises, E. Giannadakis, “Modeling of cavitation in large scale diesel injector nozzle”. In ILASS 2004. Nottingum, UK.2004.
• 3. H. Roth, K. Omae et. al, “effect of multiple injection strategy on the nozzle hole cavitation”. SAE Paper 2005-02-1237.
• 4. M. Gavaises and A. Andriotis, “cavitation inside multi-hole injectors for large diesel engines and its effect on the near nozzle spray structure”. SAE Paper 2006-01- 1114, 2006.
• 5. M. Gavaises and A. Andriotis “Vortex flow and cavitation in diesel injector nozzles” J. Fluid Mech. 2008 vol. 610, pp. 195–215.
• 6. D. Papoulis, C. Arcoumanis et. al, “Evaluation of predictive capability of diesel nozzles cavitation models” SAE Paper 2007-01-0245, 2007.
• 7. C. E. Brennen “Cavitation and bubble dynamics”, Oxford University Press. 1995.
• 8. Heywood, John “Internal Combustion Engine Fundamentals, McGraw-Hill, New York, 1989.
• 9. H.K.Versteeg and W. Malalaserekha “An Introduction to computational fluid dynamics”, Publication Longman scientific and technical, Inc.
• 10. R. S. Lagumbay, Jin Wang (2005), “Numerical simulation of supersonic 3-phase cavitating jet flow through a gaseous medium in injection nozzle”, IMECE2005-82948, 5-11 Nov.
• 11. H. Roth, M.Gavaises and C. Arcoumanis “Cavitation initiation and its development and link with flow turbulence in diesel injector nozzle.” SAE Paper 2002-01-0214, 2002.
• 12. S. B. Martynov and D. J. Mason “Numerical simulation of cavitating flows based on hydrodynamic similarity”. IMechE 2006.
• 13. L. C. Ganippa, G. Bark et. al. “Comparison of Cavitation Phenomena in Transparent scaled-up Single-Hole Diesel Nozzles” CAV2001:sessionA9.005
• 14. Henry Weller and Niklas Nordin, “Modeling injector flow including cavitation effects for diesel applications” FEDSM2007-37518.
• 15. E. Giannadakis, M. Gavaises And C. Arcoumanis, “Modelling of cavitation in diesel injector nozzles”, J. Fluid Mech. (2008), vol. 616, pp. 153–193.
• 16. Lian Duan , Shou-qi Yuan et.al, “Injection performance and cavitation analysis of an advanced 250 MPa common rail diesel injector”, International Journal of Heat and Mass Transfer 93 (2016) 388–397.
• 17. Xinping Long, Qi Liu, Bin Ji , Yiyuan Lu, “Numerical investigation of two typical cavitation shedding dynamics flow in liquid hydrogen with thermodynamic effects”, International Journal of Heat and Mass Transfer 109 (2017) 879–893.
• 18. Liang Zhang, Zhixia He et. al., “Simulations on the cavitating flow and corresponding risk of erosion in diesel injector nozzles with double array holes”, International Journal of Heat and Mass Transfer 124 (2018) 900–911

Uwagi

PL

Opracowanie rekordu ze środków MEiN, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2022-2023).