シャドウドップラ流速計を用いた微粉炭火炎内の粒子速度と粒子形状・粒径の同時計測(熱工学,内燃機関,動力など)

抄録

The velocity and size of coal particles in a laboratory-scale pulverized coal combustion flame were simultaneously measured by Shadow Doppler Velocimetry (SDV) which has the advantage over other Laser-based sizing methods for arbitrary shaped particles. The Laser Doppler Velocimetry (LDV) was also used to measure the airflow velocity and particle velocity. The results show that mean velocity of large particles is larger than mean airflow velocity due to the inertia force of particles in the case of noncombustion condition. The particle rms velocity in the combustion condition is smaller than that in the noncombustion condition. The particle size in the combustion condition gradually increases with an increase of the distance from the burner. The circurarity of the particles in the combustion condition is slightly lower than that of particles in the noncombustion condition. The mean velocity and rms particle velocity don't change with the particle size in the case of combustion condition.