The experimental system of constant volume combustion bomb for measuring laminar flame speed under the conditions of high temperature and pressure was designed and built. The composition and function of main subsystems

and the data processing method were introduced in detail. Moreover

at 400K temperature and 01

03MPa pressures the laminar flame speeds of C7 Fuels including toluene/methylcyclohexane/nheptane were measured

and compared with existing literature results. Results indicate that the experimental system has high reliability. Using this experimental system

laminar flame speeds can be accurately measured at high temperatures and elevated pressures

meanwhile the range of equivalence ratios can be extended.