Numerical Simulation of the Fuel Flow in the Flow Passage of the Injector Nozzle

The process of fuel injection through the diesel engine injector nozzle was numerically simulated under stationary and dynamic conditions taking into account the multi-phase environment. The simulation was performed using the ANSYS computational fluid dynamics simulation software. Even though the integral characteristics of the injection were nearly the same, the first and second case showed noticeable variations in the structure of the flow, and the correlation between the liquid and vapour phases of the fuel. The variations reflect the fact that the process develops over time and, therefore, there is a time delay in the injection pressure and rate. These findings should be taken into account when calculating and designing fuel supply systems for diesel engines in the future.

References

[1] Grekhov L.V., Ivashchenko N.A., Markov V.I. Toplivnaia apparatura i sistemy upravleniia dizelei [Fuel equipment and control systems of diesel engines]. Moscow, Legion-Avtodata publ., 2005. 344 p.

[2] Grishin Iu.A., Khmelev R.N., Bazaeva N.S. Postanovka granichnykh uslovii pri matematicheskom opisanii techeniia dizel’nogo topliva v trube [Statement of Boundary Conditions in Mathematical Description of Diesel Fuel Flow in a Tube]. Vestnik MGTU im. N.E. Baumana. Ser. Mashinostroenie [Herald of the Bauman Moscow State Technical University. Mechanical Engineering]. 2011, no. 2(83), pp. 102–108.

[3] Ryss K.N., Denisov A.A., Grekhov L.V., Grishin Iu.A. Raschetnoe prognozirovanie raskhodnykh kharakteristik raspylitelei dizel’noi toplivnoi apparatury [Estimated forecasting flow performance nozzles of diesel fuel equipment]. Izvestiia Volgogradskogo gosudarstvennogo tekhnicheskogo universiteta [News of Volgograd State Technical University]. 2013, vol. 5, no. 12, pp. 57–60.

[4] Husmeir F. Reduced injector losses and improved spray pattern. MTZ, 2013, vol. 74, no. 11, pp. 42–45.

[5] Stremiakov A.V. Uluchshenie pokazatelei transportnogo dizelia, rabotaiushchego na dizel’nom toplive i smesevykh biotoplivakh, putem sovershenstvovaniia konstruktsii raspylitelei forsunok. Diss. kand. tekhn. nauk [Improvements in transport diesel engine running on diesel fuel and mixed biofuels by improving the design of spray nozzles. Cand. of tech. sci. diss.]. Moscow, 2011. 16 p.

[6] Belov I.A., Isaev S.A. Modelirovanie turbulentnykh techenii [Simulation of turbulent flows]. St. Petersburg, BSTU publ., 2001. 108 p.

[7] Zalizniak V.E. Osnovy vychislitel’noi fiziki. Ch.1. Vvedenie v konechno-raznostnye metody [Basics of computational physics. Pt 1. Introduction to finite difference methods]. Moscow, Tekhnosfera publ., 2008. 224 p.

[8] Patankar S.V. Numerical Heat Transfer and Fluid Flow. McGrаw-Hill, Hemisphere Publishing Corporation, 1980. 197 p.

[9] Fletcher C.A.J. Computational Techniques for Fluid Dynamics 2: Specific Techniques for Different Flow Categories. Springer-Verlag, 1998. 496 p.

[10] ANSYS Fluent v.14.5. Release. 7.3.4. Compressible liquid density method.

[11] Kuleshov A.S. Use of Multi-Zone DI Diesel Spray Combustion Model for Simulation and optimization of Performance and Emissions of Engines with Multiple Injection. SAE Paper, 2006, no. 2006-01-1385, pp.1–17.

[12] DIESEL-RK is an engine simulation tool. Available at: http://www.diesel-rk.bmstu.ru/ (accessed 15 May 2015).