| 1. | Study on gas - solid two - phase flow in laval nozzle and laval nozzle length
缩放喷管内的气固两相流动和缩放喷管长度的研究 |
| 2. | In order to separate gas and solid two phases completely , the velocity of particles at the exit of laval nozzle should be high enough , therefore the laval nozzle should be long enough
?了更好地实现气、固两相分离，颗粒在缩放喷管出口处的速度应该足够大，因而缩放喷管就应该足够长。 |
| 3. | By increasing the length of laval nozzle , an approach was presented to obtain higher particle velocity necessary for gas - solid separation in dusty gas of high temperature and high pressure
提出了用增加缩放喷管长度的方法，使含尘高温高压气体中的灰尘颗粒获得实现气固两相分离所必需的更高动量的途迳。 |
| 4. | The flow field of fadw is very complicated , especially in the free vortex jet zone . so the method is according to the ideal flow , including the design of the asymmetric supersonic laval nozzle and the diffuser
所以，本文所建立的fadw的基本设计方法是理想状态下的设计方法，其中主要包括非对称超音速喷管的设计和气动窗口扩压器的设计方法。 |
| 5. | The conveying parameters were relatively optimized by adjusting the throat area of adjustable laval nozzle and pressure parameters , so that the foodstuff particle breaking rate during pneumatic conveying was decreased at certain extent
通过调节可调式拉法管的喉径以及各压力参数实现了输送参数的相对最优，在一定程度上减轻了粮食颗粒在输送过程中的破碎率。 |
| 6. | Based on one dimension flow theory and lagrange method , the correlation of speeding rate of particles under gas flow drag with the size of particles and the length of laval nozzle used for the gas and solid two - phase separation test apparatus was studied
摘要采用一元流动理论和拉格朗日方法，研究了用于气、固两相分离试验装置的缩放喷管内，被气流拖曳的颗粒加速率与颗粒大小和缩放喷管长度的关系。 |
| 7. | The minimum requirement for supersonic separator to accomplish its basic function is that the flow inside the separator must be at the critical state at the laval nozzle throat and its flow rate must be equal to its critical flow rate , or the dehydration performance will deteriorate
改进旋流器的设计,使其摩阻尽量小,从而使激波向远离laval喷管喉部方向移动,可以有效改善分离管的工作性能。在目前所设计的三个旋流器中,旋流器a的 |
| 8. | It is shown that with the decrease in size of particles , their velocity at the exit of laval nozzle increases under the conditions of both the invariable gas parameters and the same laval nozzle length ; the laval nozzle length increases with the size of particles under the same speeding rate of particles
研究表明，在气流参数和缩放喷管长度不变的情况下，被气流拖曳的颗粒越大，颗粒在缩放喷管出口处的速度就越低；在颗粒加速率相同的情况下，颗粒越大，所需的喷管长度就越长。 |
| 9. | Two designing methods for laval nozzle were introduced , and based on this work a design software for supersonic separator was developed . all the critical dimensions of supersonic separator can be obtained by simply inputting the parameters at the inlet of supersonic separator and the molar fractions of different components of natural gas into the design software mentioned above
在所开发成功的超音速分离管设计软件中,只要输入天然气各组分的摩尔分数、超音速分离管的入口参数,以及天然气的日处理量,就可以计算出超音速分离管所有部件的控制尺寸,完成超音速分离管的结构设计。 |
