The effect of thermodynamic and geometric parameters on the performance of a Turbocharged Diesel Engine

Abstract

The increasing complexity of modern engines has rendered the prototyping phase long and expensive. This is where engine modeling becomes in the recent years extremely useful and can be used as an indispensable tool when developing new engine concepts. The thermodynamic performance of a Turbocharged diesel engine with heat transfer and friction term losses is analyzed. This study deals with the numerical simulation and performance prediction of a turbocharged diesel engine with six-cylinder direct injection. To predict the engine performances, we developed a computer program for simulating the operation of a turbocharged diesel engine, and used the commercial GT-Power software to validate the simulation results. The range of variation of the rotational speed of the diesel engine chosen extends from 800 rpm to 2100 rpm. In this paper we studied the influence of several engine parameters on the brake power and effective efficiency. Moreover it puts in evidence the existence of two optimal points in the engine, one relative to maximum power and another to maximum efficiency; it was found that if the injection time is advanced, so the maximum levels of pressure and temperature in the cylinder are high.

Keywords

• Single-zone model, ignition compression engine, heat transfer, friction, turbocharged diesel engine, GT-Power, performance optimization.

Bir Turbo Dizel motorun performansı üzerinde termodinamik ve geometrik parametrelerin etkisi

Abstract

Modern motorlarda artan karmaşıklık prototipleme aşaması uzun ve pahalı hale gelmiştir. Motor modelleme, son yıllarda son derece yararlı olur ve yeni motor konseptleri geliştirirken vazgeçilmez bir araç olarak kullanılabilir budur. Isı transferi ve sürtünme dönem kayıpları ile Turbo dizel motorun termodinamik performans analiz edilir. Bu çalışma altı silindirli direkt enjeksiyonlu turbo dizel motorun sayısal simülasyon ve performans tahmini ile ilgilenir. Motor performanslarını tahmin etmek, bir turbo dizel motorunun çalışmasını simüle etmek için bir bilgisayar programı geliştirdi ve simülasyon sonuçlarını doğrulamak için ticari GT-Güç yazılımını kullanmıştır. Seçilen dizel motorun dönme hızının değişme çeşitleri 800 rpm 2100 rpm kadar uzanır. Bu yazıda fren gücü ve etkin verim birkaç motor parametrelerinin etkisi araştırıldı. Üstelik bu kanıt motorda iki optimum nokta, tek maksimum güç akrabası ve maksimum verimlilik için başka varlığını koyar; Bu enfeksiyon süresi, gelişmiş, yani, eğer silindir içindeki basınç ve sıcaklığın en yüksek seviyeler yüksek olduğu bulunmuştur.

Keywords

• Tek bölgeli modeli,ateşleme sıkıştırma motoru,ısı transferi,sürtünme,turboşarjlı dizel motor,GT-Güç,performans

References

1. Angulo-Brown F, Fernandez-Betanzos J and Diaz-Pico CA, “Compression ratio of an optimized Otto-cycle model,” European journal of physics 1994; 15: pp. 38–42.
2. Chen L, Lin J, Lou J, Sun F and Wu C, “Friction effect on the characteristic performances International Journal of Energy Research 2002; 26: pp.965–971.
3. Merabet A, Feidt M and A. Bouchoucha, “Effet du transfert de chaleur sur les performances d’un moteur a ` combustion interne atmosphérique fonctionnant suivant un cycle mixte,” Termotehnica 2002; 2: pp.43–46.
4. Watson N, Pilley AD and Marzouk M, “A combustion correlation for diesel engine simulation,” In: SAE Technical Paper (1980), 1980-800029.
5. Stefanopoulou A, “Modeling and control of advanced technology engines,” PhD thesis, University of Michigan, 1996.
6. Guzzella L and Amstutz A, “Control of diesel engines,” IEEE Transaction on Control Systems October 1998; 18: pp.53–
7. Heywood JB, “Internal Combustion Engine Fundamentals,” McGraw-Hill, New york, 1988.
8. Ledger JD and Walmsley S, “Computer simulation of a turbocharged diesel engine operating under transient load conditions,” SAE Technical Paper 1971, 710177.

9. Benson RS and Baruah PC, “Some further tests on a computer program to simulate internal combustion engine,” SAE Technical Paper 1973, 730667.
10. Winterborne DE, Thiruarooran C and Wellstead PE, “A wholly dynamical model of a turbocharged diesel engine for transfer function evaluation,” SAE Technical Paper, 1977; 770124.
11. Sakhrieha A and Abu-Nada E, “Computational Thermodynamic Analysis of Compression Ignition Engine,” International Communications in Heat and Mass Transfer 2010; 37; pp. 299–303.
12. Hohenberg GF, “Advanced approaches for heat transfer calculations,” SAE Technical Paper 1979, 1979-790825.
13. Rakopoulos CD, Rakopoulos CD, Mavropoulos GC and Giakoumis EG, “Experimental and theoretical study of the short-term response temperature transients in the cylinder walls of a diesel engine at various operating conditions,” Applied Thermal Engineering 2004; pp. 679-702.
14. Semin RB and Ismail R, “Investigation of Diesel Engine Performance Based on Simulation,” American Journal of Applied Sciences 2008; 5: pp.610-617.
15. Dec JE, “Advanced compression ignition cylinder processes,” Proc. Combust. Inst. 2009; 32: pp. 2727–2742.
16. Menacer B and Bouchetara M; ‘’ simulation and prediction of the performance of a direct turbocharged diesel engine’’, simulation; 2013.
17. Gamma Technologies, GT-Power User’sManual, GT-Suite Version 7.0, 2009.
18. Galindo J, Arnau FJ, Tiseira A and Piqueras Turbocompressor Boundary Condition for One-Dimensional Gas-Dynamic Codes,” Mathematical and Computer Modelling 2010; 52; pp.1288-1297.
19. Feidt M and Descieux D, “Modelling of a Spark Ignition Engine for Power-Heat Production Optimization,” Oil & Gas Science and Technology – Revue. IFP Energies nouvelles 2011; 5: pp. 737-745.
20. Ebrahimi R, “Performance of an Irreversible Diesel Cycle under Variable Stroke Length and Compression Ratio,” Journal of Ambiant Science 2009; 7: pp. 58- of the