EFFECTS OF GASOLINE AND DIESEL BLEND ON THE DIESEL ENGINE PERFORMANCE IN DIFFERENT ALTITUDE CONDITIONS

Abstract

In this paper, effects of different amount ofgasoline-diesel blend on the diesel engine performance are examined for unmanned air vehicles (UAV). According to International Standard Atmosphere (ISA) data especially after 4572 m altitude internal combustion engine performance dramatically decreases depending on atmosphere oxygen concentration, air density and pressure. This situation in air density and molecular ratio changes on altitude directly affects engine combustion and causes major changes in performance. The experimental framework involved altitude testing to evaluate the effects of a 5% gasoline-diesel fuel mixture, as determined by CFD optimization, in comparison to pure diesel fuel. Altitude conditions ranging from 0 to 18288 m, in increments of 1524 m, were tested using a specialized vacuum device to replicate high-altitude environments. The results are also qualitatively agreed with literature studies.