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. 2025 Jan 6;15:983. doi: 10.1038/s41598-024-83211-y

Table 2.

Overview of various bowl geometries and their significances3540

Researcher Geometry used Fuel/experiment or simulation Parameters employed Significance
Saito et al.35 Re-entrant chamber 100% diesel (experimental) Shall depth and re-entrance CC Lowered BSFC, less emissions
Zhu et al.36 TRCC 100% diesel (experimental) Pip area, torus radius, piston bowl lip area Improved air-fuel mixing, lowered emission, high performance
Dolak et al.37 Stepped bowl chamber 100% diesel (simulation) Swirl, modified spray angle, fuel injection rate Lowered SFC at part and full load, less CO and soot precursors
Lim et al.38 Bowl-in-piston (Mexican hat shaped) 100% diesel (simulation) Different spray angles (70, 100 and 130 deg) Lowered NOx emissions and soot (about 6.8%) for 70 deg spray angle with Mexican hat shaped geometry
Shi et al.39 Quiescent 100% diesel (experimental) Swirl ratio inducement, spray target with part and high load variation Full load with swirl resulted in higher performance and minimized emissions
Wickman et al.40 Re-entrant chamber 100% diesel (simulation) EGR, Swirl ratio, SOI, injection pressure and compression ratio Lowered BSFC, CO, NOx and CO2