Table1

Engine parameters"

Fig.1

CONVERGE simulation model"

Fig.2

Comparison of spray penetration insimulation and experiment"

Fig.3

Comparison of in-cylinder pressure insimulation and experiment"

Fig.4

Ablation position in the experiment and istribution of heat flux in the simulation"

Fig.5

Temperature iso-surface distribution in bottom view of piston at 16 ATDC （exhaust valve side on the right）"

Fig.6

Spray development process （exhaust valve side on the left，unit：m）"

Fig.7

Equivalent ratio field and temperature field on Y-section （exhaust valve side on the left，unit：K）"

Fig.8

Equivalent ratio field and velocity field on Z-section （exhaust valve side on the left）"

Fig.9

Schematic diagram of the structural parameters of the combustion chamber"

Fig.10

Comparison of the designed combustionchamber and the prototype"

Table 2

Comparison of combustion chamberstructure parameters"

Table 3

Comparison of combustion performance between the prototype and the designed combustion chamber"

Fig.11

Comparison of heat release rate"

Fig.12

Comparison of the equivalent ratio of mixture between the prototype and the designedcombustion chamber"

Fig.13

Comparison of heat flux distribution between the designed combustion chamber and the prototype"

Fig.14

Comparison of turbulent kinetic energybetween the prototype and the designedcombustion chamber （exhaust valveside on the left）"

Fig.15

Observation section"

Fig.16

Comparison of the equivalent ratio field andvelocity field of the prototype andthe designed combustion chamber"

Fig.17

Comparison of temperature distributionbetween the prototype and the designedcombustion chamber"

Fig.18

Schematic diagram of test bench"

Table 4

Comparison of parameters"

Fig.19

Comparison of cylinder pressure betweenthe prototype and chamber Ⅰ"

Fig.20

Comparison of piston top face betweenthe prototype and chamber Ⅰ"