Question

write down the effect of changing throat diameter on coefficient of discharge​

Answer 1

Answer:

Referring to regulation of ISO 9300, the discharge coefficients of 2mm, 5mm and 10mm nozzles with 2.5°, 4.0° and 6.0° diffuser angle were measured, respectively. Through comparisons among experimental results, simulation results and prediction results of empirical equations, it was clear that the discharge coefficients were the same for the nozzles with the same throat diameter and were in good agreement with the results of the empirical equations for 10mm nozzles, while that changed with different diffuser angle for other two sets of nozzles. The influence of throat diameter, surface roughness and entrance contour on discharge coefficient was analyzed one by one. The results showed the large out-of-roundness of entrance contour might be the most important reason resulted in the experimental results.

Answer 2

The diameter of the throat produces the desired effect of the flow such as a non-steady, viscous and supersonic flow in a three-dimensional direction.

Step-by-step explanation:

• In Computational Fluid Dynamics, a three-dimensional, non-steady, steam supersonic pressure exchange ejector s used.
• It has a pressure exchange mechanism as well.
• Between the primary fluid and the secondary fluid an induction process is also used to regulate the flow of liquid.
• The diameter of the throat produces the desired effect of the flow such as a non-steady, viscous and supersonic flow in a three-dimensional direction.