analysis of water injection into high-temperature mixture of ...

31FIGURE 4-1 Comparison of an actual cycle with mathematical model, b=82.6 mm,Stroke=114.3 mm, equivalence ratio 1.17, θ = − 15, θ = 33SbFIGURE 4-2 Comparison of an actual cycle with mathematical model, b=82.6 mm,Stroke=114.3 mm, r=7, equivalence ratio=0.80, θ = − 23, θ = 39When considering Figure 4-1 and Figure 4-2, These can be seen the predictedpressure-volume diagram of mathematical model, trends of the calculated curve seemto be almost the same with the actual cycle and the efficiency results having themaximum error is approximately less than 10% for both cases, which are in goodagreements. The both cases of efficiency are having a factor ranging approximately0.8 and 0.88, respectively. It is found the both cases are as following a factor rangingare 0.8-0.9 [6]. The P-V diagram difference between the mathematical model andactual cycle result as shown in Figure 4-1 and Figure 4-2 were due to the combustionSb