Optical measurement test device for evaporation rate of fuel atomized by nozzles and measurement method

The invention provides an optical measurement test device for the evaporation rate of fuel atomized by nozzles and a measurement method. The device comprises a combustion chamber and a buffer cavity sequentially connected in the gas flow direction, wherein the nozzles are arranged in the combustion chamber, a combustion chamber optical observation window is arranged on the outer wall of the combustion chamber, and a planar laser transmitter is arranged outside the combustion chamber observation window; the buffer cavity is equipped with an exhaust pipeline in the direction perpendicular to the gas flow direction, a buffer cavity optical observation window is mounted in the direction, facing the gas flow, of the buffer cavity, and a high-speed camera is arranged outside the buffer cavity optical observation window. According to the optical measurement test device and the measurement method, the fuel evaporation rate of fuel, sprayed to one cross section in the combustion chamber through the nozzles, in a gas turbine or an internal combustion engine can be measured quantitatively, and the test result can be used for optimizing the design of the combustion chamber and the nozzles.