The present paper introduces a new concept of a flowrate measuring device named ‘Discus flowmeter’ in the class of obstruction flowmeter. The device has a symmetrical body creating the obstruction and the flow is thru the annulus. It works on the same principle as other obstruction type pressure differential flowmeters. The investigation is carried out for different diameter ratios (β-values) using three pressure tap combinations in the range of 10³ ≤ Re ≤ 10⁶ to explore the effect of these parameters on the performance of Discus flowmeter. The evaluation of discharge coefficient (C_d) is done for three pressure tap combinations and the permanent pressure loss coefficient is also evaluated. The variation of Cd with Reynolds number shows that for the pressure tap combination of 1D upstream and the stagnation point downstream of the body is nearly independent of β-value. The mean C_d value is almost the same as that of the V-cone flowmeter as laid down in ISO 5167-5. The permanent pressure loss coefficient for the Discus flowmeter is lower compared to the V-cone flowmeter for all β-values studied. As the body is symmetric in x-y plane, the flowmeter could also be used in both the directions (bi-directional flowmeter). It is expected that the Discus flowmeter could be a better alternative to the conventional obstruction flowmeters.

本文介绍了阻塞流量计一类的流量测量装置“ Discus流量计”的新概念。该设备具有对称的主体，会产生阻塞，并且流经环带。它的工作原理与其他阻塞式压差流量计相同。调查一种用于在10的范围内使用三个压力抽头组合不同直径比（β值）进行³  ≤ 重新 ≤10 ⁶探索这些参数对铁饼流量计的性能的影响。放电系数的评估（C _d）完成了三个压力攻丝组合的操作，并且还评估了永久压力损失系数。Cd随雷诺数的变化表明，对于一维上游和下游下游滞止点的压力抽头组合几乎与β值无关。平均C _d值几乎与ISO 5167-5中规定的V型锥形流量计的值相同。对于所有研究的β值，铁饼流量计的永久压力损失系数均低于V锥流量计。由于主体在xy平面上是对称的，因此该流量计也可以在两个方向上使用（双向流量计）。可以预期，铁饼流量计可以替代传统的阻塞流量计。