A study on the Spray development under Non- Vaporizing condition using Gasoline-Biodiesel blend in Constant Volume Combustion Chamber

Abstract

This paper investigates the physical properties of spray development using the Gasoline-Biodiesel blend in the Gasoline compression ignition (GCI) engines simulated using the Constant volume combustion chamber (CVCC). The results are evaluated based on images analyzed from the spraying process under injection pressure ranging from 400 to 1000 bar. In addition, the variation of injection duration between 1500 μs and 2000μs can help to evaluate the development of the spray in correspondence with the injector's needle initial opening until fully opened. The results including spray cone angle, spray penetration length, and spray development are in line with the trend of the previous studies. At pressure 40 MPa, the spray beam extension of GL is higher than GB but during the same jet development timing from 0 to 2100 μs, GB has spray impingement faster than GL. In addition, the result of the spray penetration length indicates that when the injection pressure is raised from 40 to 100, the time of spray impingement is shortened . However, results at 40 and 60, 80 MPa show the effect of injection duration. At some point the injection duration increased but the wall hit time was longer than in other cases. This can be explained because the farther the beam goes, the more tangled it will be and this tangled area can affect the process of spray impingement. These results, therefore, lay the foundation for capturing the properties and structure of the spray for optimal developments during the combustion process of the GCI engines by means of CVCC simulation process.