Energetic Analysis of the Aircraft Diesel Engine

Abstract

The analysis of the distribution of thermal energy generated during the combustion process in internal combustion engines and the estimation of individual losses are important regarding performance and efficiency. The article analyses the energy balance of the designed two-stroke opposed piston diesel engines with offset, i.e. the angle by which the crankshaft at the side of exhaust ports is ahead of the crankshaft at the side of intake ports. Based on the developed zero-dimensional engine model, a series of simulations were performed in steady-state conditions using the AVL BOOST software. The values of individual energy losses, including cooling losses, exhaust gas losses, friction losses were obtained. The influence of decreasing and increasing the offset on the performance of the tested engine was analysed.

Coolant pump for compression-ignition aircraft engine

“…In the AVL BOOST software, an OPE engine model has been developed to determine the energy balance of the motor, which is shown graphically in the Sankey diagram in Fig. 2 [10]. It shows that the heat to be dissipated from the engine is the value resulting from the "Cooling" combustion chamber (27 kW) and friction (15.9 kW).…”

“…Sankey's energy balance graph of OPEs aircraft engine with its mechanical compressor -Rotrex C30-64[10] …”

Analyzing mechanical vibrations of an aircraft opposed piston engine

“…[3]. In addition, some manufacturers are attempting to use compression ignition engines or engines with reciprocating pistons to power aircraft [7,8,15]. Two-stroke engines with opposed pistons have been known since 1890.…”