Mechanical & Aerospace Engineering

Biography

Biography: Onder ALTUNTAS

Abstract

In this study, energy and exergy losses of around piston-prop aircraft engine –naturally aspirated, opposite, four cylinders and air–cooled and 360 in3 cylinder displacement– cylinders in the taxi phase are investigated. The taxi phase is part of the landing and take-off (LTO) phase and about three-fifths of the total LTO phase. A wide range of applications was considered in the calculations. While the duration of the taxi-out, a stage of before the take-off, was measured to be 6m30s, the duration of the taxi-in, a stage of after the landing, was measured to be 5m18s. The remaining phase, the rest of the LTO and cruise, was 1h50m. The outside air temperatures in the taxi-out, and taxi-in were 15.76 ºC and 21.46 ºC, respectively. Under these conditions, the maximum energy and exergy loss rates were calculated 13.39 kW and 3.85 kW for the second cylinder in the taxi-in, while the minimum energy and exergy loss rates were obtained to be 12.85 kW and 3.45 kW for the third cylinder in the taxi-out, respectively. The maximum energy and exergy efficiencies were determined to be 19.96% and 14.63% in the taxi-in, respectively.