Email Document Reference

Enter your email address below and the reference for this document will be sent to shortly from webmaster@ceesi.com.

Title: Experimental Investigation on Geometric Parameters of S-type Pitot tube for Greenhouse Gas Emission Monitoring
Author: Woong KANG NGUYEN Doan Trang Yong Moon CHOI Sang Hee LEE
Source: 2018 International Symposium on Fluid Flow Measurement
Year Published: 2018
Abstract: In greenhouse gas emission monitoring from industrial smoke-stacks in South Korea, the most common device used to measure stack gas velocity is the S-type Pitot tube for estimating volumetric flow rate in the stack by a Continuous Emission Measurement (CEM). The S-type Pitot tube installed at the stack is inevitably affected in the velocity measurement by the velocity change, yaw and pitch angle misalignment. However, the flow velocity in the stack is determined by the S-type Pitot tube coefficient which does not take into account the effect of the velocity change, yaw and pitch angle change on the S-type Pitot tube. The geometric parameters of Stype Pitot tube such as an external diameter, the distance between impact and wake orifices and the bending angle of orifices are described differently in several international documents which are ISO, ASTM and EPA. Various geometries of S-type Pitot tube can affect the characteristics of S-type Pitot tube coefficients including the sensitivity to velocity change, the pitch and yaw angle misalignment. However, there is no detailed guidelines of S-type Pitot tube geometry considering the accurate and reliable measuring characteristics in the international standards. In the present study, S-type Pitot tubes with various geometric parameters, in this case the distance (L1.05, 1.6 and 3D) between impact and wake orifices and the bending angle (a15, 30 and 45) of orifices were manufactured by a 3D printer. Wind tunnel experiments were conducted in Korea Research Institute of Standards and Science air speed standard system to determine the effect of geometric parameters on S-type Pitot tube coefficients with the change of velocity, yaw and pitch angle.

In order to prevent spam and automated file downloads for documents within the Measurement Library, please follow the instructions below and then you will be able to email a reference to this article.