Effect of turbine upstream geometry on pulsating flow and turbocharged si-engine performance.
The pulsating exhaust flow propagates through the exhaust line upon opening of exhaust valves while carrying a high amount of energy (high pressure and temperature). The amount of energy delivered to the turbine could be affected by turbine upstream geometry along with the propagation. Therefore, in...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Korean Society of Automotive Engineers
2023
|
| Subjects: | |
| Online Access: | http://eprints.utm.my/105465/1/JeyoungKim2023_EffectofTurbineUpstreamGeometryonPulsatingFlow.pdf |
| _version_ | 1811132139480023040 |
|---|---|
| author | Kim, Jeyoung Chiong, Meng Soon Rajoo, Srithar |
| author_facet | Kim, Jeyoung Chiong, Meng Soon Rajoo, Srithar |
| author_sort | Kim, Jeyoung |
| collection | ePrints |
| description | The pulsating exhaust flow propagates through the exhaust line upon opening of exhaust valves while carrying a high amount of energy (high pressure and temperature). The amount of energy delivered to the turbine could be affected by turbine upstream geometry along with the propagation. Therefore, in this study, the impact of the turbine upstream geometry (diameter, length of exhaust runner, and exhaust manifold volume) on pulsating flow and engine & turbocharger has been investigated using 1D engine simulation packages, AVL-BOOST. A validated 1-liter 3-cylinder SI-engine model was utilized as a base engine model. The simulation captured how different geometry influences the pulsating pressure profile and the impact on system-level performance and behavior. The current research highlighted that the exhaust manifold volume is strongly associated with exhaust resistance, scavenging, pulsation, knocking, and fuel economy. By minimizing unnecessary volume in the exhaust manifold, it presents high potentials to improve low-speed torque (∼15 %), fuel consumption (∼2.4 %), brake thermal efficiency (∼1.4 %), scavenging and knock resistance against the baseline model. |
| first_indexed | 2024-09-23T23:57:29Z |
| format | Article |
| id | utm.eprints-105465 |
| institution | Universiti Teknologi Malaysia - ePrints |
| language | English |
| last_indexed | 2024-09-23T23:57:29Z |
| publishDate | 2023 |
| publisher | Korean Society of Automotive Engineers |
| record_format | dspace |
| spelling | utm.eprints-1054652024-05-02T02:51:27Z http://eprints.utm.my/105465/ Effect of turbine upstream geometry on pulsating flow and turbocharged si-engine performance. Kim, Jeyoung Chiong, Meng Soon Rajoo, Srithar TJ Mechanical engineering and machinery The pulsating exhaust flow propagates through the exhaust line upon opening of exhaust valves while carrying a high amount of energy (high pressure and temperature). The amount of energy delivered to the turbine could be affected by turbine upstream geometry along with the propagation. Therefore, in this study, the impact of the turbine upstream geometry (diameter, length of exhaust runner, and exhaust manifold volume) on pulsating flow and engine & turbocharger has been investigated using 1D engine simulation packages, AVL-BOOST. A validated 1-liter 3-cylinder SI-engine model was utilized as a base engine model. The simulation captured how different geometry influences the pulsating pressure profile and the impact on system-level performance and behavior. The current research highlighted that the exhaust manifold volume is strongly associated with exhaust resistance, scavenging, pulsation, knocking, and fuel economy. By minimizing unnecessary volume in the exhaust manifold, it presents high potentials to improve low-speed torque (∼15 %), fuel consumption (∼2.4 %), brake thermal efficiency (∼1.4 %), scavenging and knock resistance against the baseline model. Korean Society of Automotive Engineers 2023-04 Article PeerReviewed application/pdf en http://eprints.utm.my/105465/1/JeyoungKim2023_EffectofTurbineUpstreamGeometryonPulsatingFlow.pdf Kim, Jeyoung and Chiong, Meng Soon and Rajoo, Srithar (2023) Effect of turbine upstream geometry on pulsating flow and turbocharged si-engine performance. International Journal Of Automotive Technology, 24 (2). pp. 527-539. ISSN 1229-9138 http://dx.doi.org/10.1007/s12239-023-0044-3 DOI: 10.1007/s12239-023-0044-3 |
| spellingShingle | TJ Mechanical engineering and machinery Kim, Jeyoung Chiong, Meng Soon Rajoo, Srithar Effect of turbine upstream geometry on pulsating flow and turbocharged si-engine performance. |
| title | Effect of turbine upstream geometry on pulsating flow and turbocharged si-engine performance. |
| title_full | Effect of turbine upstream geometry on pulsating flow and turbocharged si-engine performance. |
| title_fullStr | Effect of turbine upstream geometry on pulsating flow and turbocharged si-engine performance. |
| title_full_unstemmed | Effect of turbine upstream geometry on pulsating flow and turbocharged si-engine performance. |
| title_short | Effect of turbine upstream geometry on pulsating flow and turbocharged si-engine performance. |
| title_sort | effect of turbine upstream geometry on pulsating flow and turbocharged si engine performance |
| topic | TJ Mechanical engineering and machinery |
| url | http://eprints.utm.my/105465/1/JeyoungKim2023_EffectofTurbineUpstreamGeometryonPulsatingFlow.pdf |
| work_keys_str_mv | AT kimjeyoung effectofturbineupstreamgeometryonpulsatingflowandturbochargedsiengineperformance AT chiongmengsoon effectofturbineupstreamgeometryonpulsatingflowandturbochargedsiengineperformance AT rajoosrithar effectofturbineupstreamgeometryonpulsatingflowandturbochargedsiengineperformance |