CFD model of the CNG direct injection engine

• Autorzy: Czyż Z. , Pietrykowski K.
• Języki publikacji: EN

Abstrakty

EN

The paper presents CFD analysis of fuel flow in the CNG injector. The issues such a pressure drop along an injector channel, mass flow through the key sections of the injector geometry, flow rates, the impact of the needle shape on the deflection of the sprayed gas cone and the impact of the wall head are analyzed in the article. The simulation was made in the transient states conditions for full injection process, including the opening and closing of the injector. An injection time of 6 ms, velocity of 0.33 mm/ms and a lift of 0.5 mm were selected for opening and closing of injector based on experimental test. The simulation shows that the volume inside the injector is a kind of fuel accumulator, and the opening process of the needle influence the flow parameters in an inlet cross-section after a certain time, depending on a channel cross section. The calculations allowed to select the ratio of an injector duct cross sectional area to the aperture area of the injection capable of the reducing pressure loss. The unusual location of the injector in the socket of a glow plug in the Andoria ADCR engine makes a stream be impaired by a part of the head. This research result would be useful in developing an injector construction which will be used for an investigation of CNG addition into diesel engine.

Słowa kluczowe

EN

simulation and modeling; gas injection; methane injection; direct injection

• Wydawca: Lublin University of Technology ; Polish Society of Ecological Engineering (PTIE), Branch of PTIE in Lublin
• Czasopismo: Advances in Science and Technology. Research Journal
• Rocznik: 2014
• Tom: Vol. 8, nr 23
• Strony: 45--52
• Opis fizyczny: Bibliogr. 11 poz., fig., tab.

Twórcy

autor

Czyż Z.

• Department of Thermodynamics, Fluid Mechanics and Aviation Propulsion Systems, Faculty of Mechanical Engineering, Lublin University of Technology, 36 Nadbystrzycka Str., 20-618 Lublin

autor

Pietrykowski K.

• Department of Thermodynamics, Fluid Mechanics and Aviation Propulsion Systems, Faculty of Mechanical Engineering, Lublin University of Technology, 36 Nadbystrzycka Str., 20-618 Lublin

Bibliografia

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• 3. Tonini, S., Gavaises, M., Theodorakakos, A., Cossali, G.E., Numerical investigation of a multiple injection strategy on the development to high-pressure diesel sprays. Proc. IMechE, Part D: J. Automobile Engineering, 224 (1), 2010, 125–141.
• 4. Som S., Aggarwal S.K., El-Hannouny E.M., Longman, D.E., Investigation of Nozzle Flow and Cavitation Characteristics in a Diesel Injector. J. Eng. Gas Turbines Power, 132(4), 2010, (12 pages).
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• 6. Margot X., Hoyas S., Fajardo P., Patouna S., Mathematical and Computer Modelling. 52, 2010, 1143–1150.
• 7. Payri F., Margot X., Patouna S., Ravet F. et al., A CFD Study of the Effect of the Needle Movement on the Cavitation Pattern of Diesel Injectors. SAE Technical Paper 2009-24-0025, 2009.
• 8. Lee W.G., Reitz R.D., A Numerical Investigation of Transient Flow and Cavitation Within Minisac and Valve-Covered Orifice Diesel Injector Nozzles. Transactions – ASM Journal of Engineering for Gas Turbines and Power; 132, 5, 052802.
• 9. HELP program AVL Boost.
• 10. Pietrykowski K., Grabowski Ł., Sochaczewski R., Wendeker M., The CFD model of the mixture formation in the Diesel dual-fuel engine. Combustion Engines, 154(3), 2013, 476–482.
• 11. Czarnigowski J., Effect of calibration method on gas flow through pulse gas injector: Simulation tests. Combustion Engines, 154(3), 2013, 383–392.