| 1. | Laser doppler anemometer , laser doppler velocimeter
激光多普勒测速计 |
| 2. | Lda laser doppler anemometer
激光多普勒测速仪 |
| 3. | Ld ? laser doppler anemometer
激光多普勒测速仪 |
| 4. | Ld laser doppler anemometer
激光多普勒测速仪 |
| 5. | The typical velocity field and the pressure on the step surface of the stepped spillway are measured using the laser doppler anemometer and the piezometer tube respectively
采用多普勒激光测速仪和测压管分别对阶梯溢流坝面典型速度场和阶梯表面压力进行详细测量。 |
| 6. | The velocity profiles along the channel section are measured using the laser doppler anemometer . according to the velocity distribution , boundary shear and the coefficient of friction between the flow and rubber panel , is determined
采用多普勒激光测速仪对过流断面的流速分布进行了测量，并根据流速分布推求出坝面上橡胶板所受的水流剪应力，和水流对橡胶板的摩阻系数。 |
| 7. | In order to deeply study the characteristics of overflow and seek for the measure to increase the energy dissipation of the stepped spillway at large edt discharge , the method of model test and theory analyze are used to study the stepped spillway oveffiow the typical velocity field of oveffiow is measured using the laser doppler anemometer and the mechbosm of the energy dissipation is analyzed
为了进一步深入研究阶梯溢流坝坝面水力特性，同时探求在大单宽流量下提高阶梯溢流坝消能率的措施，本文主要采用物理模型试验和理论分析相结合的方法对阶梯溢流坝坝面水力特性进行了较为系统的研究。首次采用了激光多普勒测速仪对阶梯溢流坝的典型速度场进行了详细测量，分析了阶梯溢流坝的消能机理。 |
