Validation of a Polytropic-Based Blow by Model and Predicting Crevice Flow Cyclic Variations in a CNG SI ‎Engine‎

Document Type : Research Paper


Department of Mechanical Engineering, Faculty of Engineering, University of Mohaghegh Ardabili, Ardabil, Iran.


In the present work, first a Polytropic-Based Blowby Model (PBBM) was validated using a Thermodynamic Simulation Code (TSC). Then, using the results extracted from a single-cylinder SI research engine, the P- of an Ensemble Average Cycle (EAC) was calculated the experimental cycles. The crevice flow rates of the EAC were estimated using both codes. The results showed a good agreement between them.


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