Does the v-cone flowmeter principle affect the form of the pressure withdrawal port?

Project Overview

The working principle of the V-cone flowmeter is based on the fact that when the fluid passes through a V-shaped cone located in the center of the pipe, a differential pressure is generated due to the obstruction of the flow by the cone and the change in flow velocity distribution. This throttling effect causes the fluid to increase in speed and decrease in pressure when passing through the tip of the cone, forming an obvious pressure difference (P1-P2 or △P) upstream and downstream of the cone. This differential pressure has a certain functional relationship with the flow rate through the flow meter, and the volume flow rate can be calculated based on Bernoulli's equation and other fluid mechanics principles.

The form and position of the pressure tapping port are designed based on this principle to ensure that the maximum differential pressure signal generated before and after the cone is accurately captured. Normally, a V-cone flowmeter will set up a positive pressure port at a certain distance upstream of the cone to measure the high pressure P1, and set up a negative pressure port at an appropriate position downstream of the cone to measure the low pressure P2. The design of the pressure tapping port must be able to reflect the pressure distribution across the entire section while avoiding the influence of unstable factors such as vortex and secondary flow, thereby ensuring measurement accuracy and stability.

Therefore, the form and arrangement of the pressure port of the V-cone flowmeter will indeed be affected by its working principle and needs to be carefully designed to meet the measurement needs under different working conditions.