Investigation of fuel volatility on the heat transfer dynamics on piston surface due to the pulsed spray impingement

•Fuel volatility on heat transfer dynamics of pulsed spray impingement is investigated.•Impinging and cooling intensities are reduced as spray converts to flash boiling.•Transient heat transfer is sensitive to changes of injection temperature and distance.•Transient heat transfer behavior of fuel is greatly influenced by its volatility.•Correlations are proposed to describe the relationship between qmax and Pa/Psat.