The experimental studies were performed within the Mach number range from 2 to 10.7 and Reynolds number based on the model inlet height of Re=(1～5)10 6. The numerical and experimental results are in good agreement.

the flow capture curve's curvature and the inlet height are the other important parameter which play an important role on the Cone-derived waverider and Osculating-C one waverider respectively;

Investigation shows that semivertex angle and the inlet height are the two most important parameters which play important role on the Osculating-Cone waverider performance;

The effects of inlet height of the separator (h 1), ratio of cross sectional area of riser to downcomer (A r/A d), ratio of cross sectional area of separator to downcomer (A f/A d) and gas flow rate (Q g) on critical circularion liquid velocity were investigated in a Forced External loop Reactor by cold model test with air water system.

Dual fireproof oil reservoirs should be designed,and the oil inlet height should not be lower than that of the water outlet to siphon oil in and drain water off.

The experimental studies were performed within the Mach number range from 2 to 10.7 and Reynolds number based on the model inlet height of Re=1-5×106.

In Figure 1, the downstream channel was defined to have unit height L with a step height and inlet height L/2.

It will be increased if necessary, to satisfy both the minimum liquid to inlet height and the total vessel length.

In China, to calculate airflow resistance coefficient of a natural draft cooling tower, the following experimental equation is usedWhere: D is the diameter of a tower ; h is the inlet height ; F is the area at elevation of the packing; F1 is the outlet area; ξf is the resistance coefficient of the drench device.Equation (1) has obvious defects because it contains no influence of water loading, airflow velocity and the herringbone columns etc.In this paper, a new equation for the caluclation of the airflow...

In China, to calculate airflow resistance coefficient of a natural draft cooling tower, the following experimental equation is usedWhere: D is the diameter of a tower ; h is the inlet height ; F is the area at elevation of the packing; F1 is the outlet area; ξf is the resistance coefficient of the drench device.Equation (1) has obvious defects because it contains no influence of water loading, airflow velocity and the herringbone columns etc.In this paper, a new equation for the caluclation of the airflow resistance coefficient of a cooing tower from the inlet to throat has been obtained as following:Where: ε is the rate of the inlet area to the area at elevation of the packing, other symbols are same as above.Equation (2) is used under the condition that there is no water, while equation (3) is used for rain zone. Therefore, the airflow resistance coefficient for a cooling tower from inlet to throat isEquation (4) can be used in normal design conditions.

A two-dimensional diffuser with a lower curved wall and upper flat plate is studied.There is aparallel channel connected with the exit of the diffuser.The turbulent boundary layer separates on thelower wall due to the strong adverse pressure gradient,and then the separated boundary layer reattach-es on the parallel channel.In the inlet of the diffuser,Reynolds number based on the inlet height ofthe channel is 10400 and based on the local boundary-layer momentum thickness is 4980 and the inletvelocity is...

A two-dimensional diffuser with a lower curved wall and upper flat plate is studied.There is aparallel channel connected with the exit of the diffuser.The turbulent boundary layer separates on thelower wall due to the strong adverse pressure gradient,and then the separated boundary layer reattach-es on the parallel channel.In the inlet of the diffuser,Reynolds number based on the inlet height ofthe channel is 10400 and based on the local boundary-layer momentum thickness is 4980 and the inletvelocity is 2 5.2m/s.A two-dimensional laser doppler velocimeter was employed to survey the flowfield.Mean velocity and Reynolds stresses were measured from upstream of the separation to thedownstream of the reattachment with 23 sections.Theminimum distance from the surfaceis 0.3mm. The wall pressure and static pressure profiles are presented. The result shows that the strong adversepressure gradient ,wall curvature and strcamline curvature play an important role in the separation. The analysis gives that cross-stream pressure gradient is signifieant in the separating flow. The maxi-mum of the displacement thickness curvature K_(max)corresponds to the intermittency transitory detach-ment(ITD)and to the minimum normal pressure difference. Sandborn&Kline′s separation criterion isnot suitable to the present flow due to indicate a smaller separating region than that in the experiment.several velocity profiles are compared with the experiment.Bardina′s velocity profile can fit the ex-perimental results well before ITD,but ean not fit those well in the detached flow,Cross′s velocityprofile can fit the experimental profiles well in the separated flow.

The effects of inlet height of the separator (h 1), ratio of cross sectional area of riser to downcomer (A r/A d), ratio of cross sectional area of separator to downcomer (A f/A d) and gas flow rate (Q g) on critical circularion liquid velocity were investigated in a Forced External loop Reactor by cold model test with air water system. An empirical correlation by fitting to the experimental data was obtained as following: u c=0.357(A fA d) 0.943 ·h 0.865 1·(A rA d) 0.221...

The effects of inlet height of the separator (h 1), ratio of cross sectional area of riser to downcomer (A r/A d), ratio of cross sectional area of separator to downcomer (A f/A d) and gas flow rate (Q g) on critical circularion liquid velocity were investigated in a Forced External loop Reactor by cold model test with air water system. An empirical correlation by fitting to the experimental data was obtained as following: u c=0.357(A fA d) 0.943 ·h 0.865 1·(A rA d) 0.221 ·Q -0.117 g