Design and Implementation of a New Generation of Turbo Charger Test Benches Using Hot Gas Technology

Surge limit definition in a specific test bench for the characterization of automotive turbochargers

“…However authorsÕ presented test bench need an additional engine break, in spite of this, the bench allows a higher temperature test range, higher turbine inlet pressure and continuous and pulsating flow at the turbine inlet. The test bench presented allows as much mass flow range as similar installations [20,34,36], only one of the installations presented on the bibliography [35] allows higher mass flow range, but needs four volumetric compressors.…”

“…In order to avoid the extra energetic cost and maintain sufficiently clean hot gas mass flow, other authors propose the use of gas burners fed with propane [34,35] or natural gas. Another way of limiting the electric consumption, particularly if there are limitations in the high voltage electric power available, is to drive the supply compressor with a heavy-duty engine [34].…”

“…Most test benches [34][35][36][37][38] only continuous flow is provided at the turbine inlet. However, due to the importance of the pressure pulsation over the turbine efficiency, some researchers have developed test benches for generating pressure pulses.…”

“…In this work an specific test bench for turbocharger testing is presented and detailed in Section 2, the main difference in this bench with respect to others [17,20,[33][34][35][36] is that it is an experimental device capable of reproducing, with real exhaust gas mass flow, the flow conditions at the turbine and compressor inlet quite close to the existing when they are placed in an internal combustion engine. Furthermore, turbochargers can be tested under highly controlled conditions, making it possible to change each mass flow property independently, such as turbine inlet mass flow temperature or pressure pulses frequency and amplitude.…”

Contribución a la Mejora del Margen de Bombeo en Compresores Centrífugos de Sobrealimentación

“…En la figura 2.10 se muestra un esquema simplificado de la instalación. Los parámetros medidos se presentan por regla general en un mapa de relación de compresión versus gasto másico, según los estándares establecidos para las turbo-máquinas [8,56,57,58,75,85]. Las medidas de régimen de giro del compresor y de relación de compresión, se corrigen mediante factores adimensionales que tienen en cuenta las condiciones atmosféricas.…”