Study of the Effects on Turbocharger Performance Generated by the Presence of Foreign Objects at the Compressor Intake

The study performed on this work consists of evaluating the consequences of the introduction of various foreign objects at the compressor inlet of a turbocharger. The most plausible objects were selected. A specific test bench was set up in order to perform the experiment and measure the compression ratio and compressor efficiency evolution. Measurements were performed before (healthy compressor) and after the object introduction (damaged compressor). Results obtained indicate that losses in performance can be very important, but also that the compressor can swallow hard objects without visible damage. Therefore the experiments were filmed with a high speed camera. Visual information has helped to better understand the phenomenon, to explain the measurements and it has been taken into account in order to perform final diagnosis. As expected, the harder the object is and the longer it hits compressor wheel before being swallowed, the most severe is the damage. Nevertheless, softer material can reach abnormal performance but in randomly manner and such incipient damage can be detected easily in high air flow rates than in lower.The authors wish to thank Spanish Grant TRA2007-65433/TAIR from Ministerio de Educacion y Ciencia. D.G. Investigacion for supporting this work.Serrano Cruz, JR.; Tormos Martínez, BV.; Gargar, KL.; Bouffaud, F. (2013). Study of the Effects on Turbocharger Performance Generated by the Presence of Foreign Objects at the Compressor Intake. Experimental Techniques. 37(2):30-40. https://doi.org/10.1111/j.1747-1567.2011.00795.xS3040372Watson, N., & Janota, M. S. (1982). Turbocharging the Internal Combustion Engine. doi:10.1007/978-1-349-04024-7Gjika , K. Larue , G.D. “Dynamic Behaviour of Rotor-Bearing Systems Involving Two Oil Films in Series-Application to High-Speed Turbochargers,” IMechE Conference Transactions C602/021/2002. Seventh International Conference on Turbochargers and Turbocharging 2002Galindo, J., Serrano, J. R., Guardiola, C., & Cervelló, C. (2006). Surge limit definition in a specific test bench for the characterization of automotive turbochargers. Experimental Thermal and Fluid Science, 30(5), 449-462. doi:10.1016/j.expthermflusci.2005.06.002Engels , B. “Lifetime Prediction for Turbocharger Compressor Wheels-Why Use Titanium?” IMechE Conference Transactions C602/037/2002. Seventh International Conference on Turbochargers and Turbocharging 2002Ahdad , F. Soare , M.A. “Prediction of Duration of Life of Automotive Components under Thermomechanical Fatigue,” IMechE Conference Transactions C602/020/2002. Seventh International Conference on Turbochargers and Turbocharging 2002Holmes , R. “Turbocharger Vibration - A Case Study,” IMechE Conference Transactions C692/031/2002. Seventh International Conference on Turbochargers and Turbocharging 2002Zhao , X. He , H. Xu , S. “Influence of the Floating-Ring Bearing Parameters on Stability of Turbocharger Rotor-Bearing System,” Proceedings of the Fourth International Symposium of Fluid Machinery and Fluid Engineering. 421 425 2008SAE J1826 Turbocharger Gas Stand Test Code, Recommended Practice 1995Luján , J.M. Bermudez , V. Serrano , J.R. Cervelló , C. “Test Bench for Turbocharger Groups Characterization,” SAE Paper 2002-01-0163.Serrano , J.R. Guardiola , C. Dolz , V. Tiseira , A. Cervelló , C. “Experimental Study of the Turbine Inlet Gas temperature influence on Turbocharger Performance,” SAE Paper 2007-01-1559.Macián, V., Luján, J. M., Bermúdez, V., & Guardiola, C. (2004). Exhaust pressure pulsation observation from turbocharger instantaneous speed measurement. Measurement Science and Technology, 15(6), 1185-1194. doi:10.1088/0957-0233/15/6/020The International Council on Combustion Engines (CIMAC) Turbocharging Efficiencies - Definitions and Guidelines for Measurements and Calculation 200

An objective reflection about the potential future of diesel vehicles against arguments based on energy populism

[ES] Los vehículos diésel de automoción están sufriendo en los últimos tiempos un ataque y discriminación a diferentes niveles ante una tecnología competitiva (vehículos eléctricos) que igualmente está recibiendo demasiada atención mediática y encumbramiento sin un claro soporte científico en ninguna de las dos caras. Aquí se ha presentado una comparativa objetiva de pros y contra en ambos casos, en base a recientes estudios así como a datos objetivos que hay que tener en cuenta de cara a un claro análisis objetivo.Payri, R.; Serrano, J.; Tormos, B.; Gómez-Vilanova, A. (2019). Una reflexión objetiva del potencial futuro de los vehículos diesel frente a los argumentos basados en el populismo energético. DYNA Ingeniería e Industria. 94(5):480-482. https://doi.org/10.6036/9245S48048294

The real necessity of Internal Combustion Engines development for fighting against climatic change crisis from the point of view of Road Transport

[ES] Los motores de combustión interna alternativos (MCIA) son el principal sistema de propulsión en el transporte por carretera. El presente trabajo presenta un análisis objetivo de la imposibilidad directa del reemplazo total de los mismos como planta motriz en los vehículos. A día de hoy, este comentario es absolutamente cierto incluso considerando el mejor escenario de previsión de crecimiento para los vehículos eléctricos e híbridos. Los argumentos para defender esta postura tienen en cuenta el crecimiento en la demanda de transporte, el avanzado desarrollo de motores ultra limpios y de alta eficiencia, la disponibilidad de combustibles de origen fósil, los bajos tiempos de repostaje y alta densidad energética de los combustibles líquidos. Todos ellos son fuertes argumentos para apoyar una viabilidad a medio y largo plazo de los MCIA como planta propulsora predominante en las aplicaciones del transporte por carretera.[EN] Internal combustion engines (ICE) are the main propulsion systems in road transport. This work discusses the impossibility of replacing them as a power plant in most vehicles. Nowadays, this statement fulfils even considering the best growth scenario for all-electric and hybrid vehicles. The arguments supporting this position took into account the growing demand for transport, the strong development of ultra clean and more efficient ICE, the availability of fossil fuels, the low refuelling times and the high energy density of liquid fuels. Overall, there seemed to be strong arguments to support the medium-long-term viability of the ICEs as the predominant power plant for road transport applications.Serrano, J.; Payri, R.; Tormos, B.; Gómez-Vilanova, A. (2019). ¿Por qué es necesario seguir desarrollando motores de combustión para luchar contra la crisis climática global desde la perspectiva del transporte?. Tecnica Industrial. (324):48-54. https://doi.org/10.23800/10329S485432