A study of flow phenomena in internal (piston) combustion engines
Abstract
A zero dimensional model of the intake stroke, and a three dimensional model of the inlet port flow (for the cylinder head swirl coefficient) of an internal combustion engine were developed. Electric discharge anemometers were designed in order to check model predictions. Tests on a motorcycle engine show that solid body approximation, used in the zero dimension model, is practicable, although the intake flow still has a clear effect during the compression stroke. The calculated initial swirl rev is much lower than measured. Measurements in a direct injection diesel engine were compared with initial conditions of the 3-D simulation. The calculated initial swirl rev is higher than measured. The calculated and measured results of the swirl coefficient agree.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- October 1982
- Bibcode:
- 1982STIN...8328405S
- Keywords:
-
- Air Flow;
- Computational Fluid Dynamics;
- Internal Combustion Engines;
- Boundary Value Problems;
- Finite Difference Theory;
- Flow Velocity;
- Hot-Wire Anemometers;
- Inlet Flow;
- Swirling;
- Three Dimensional Models;
- Turbulent Flow;
- Fluid Mechanics and Heat Transfer