Flow Investigation inside A Curved Square Duct
Journal Title: International Journal of engineering Research and Applications - Year 2017, Vol 7, Issue 5
Abstract
This paper presents the results of an experimental work with measurement of wall static pressure of 90°C shaped Curved duct. The test duct is made up of transparent perspex sheets to facilitate the flow visualization study. The duct has an inlet to exit area ratio of 1.0 with centerline distance of 750 mm. The inlet aspect ratio of the test duct has been fixed at 1.0. The velocities for the proposed investigations are to be measured by using a Pitot tube.Wall pressures are measured with the help of an inclinedmanometer with the inclination of 35°. The manometer had two tubes emanating from it: one left open to the atmosphere and the other connected to the steel pipes attached to the four walls of the curved duct. The difference in the readings helped us calculate the static pressure and thereby the normalized pressure. Wall pressure distribution along the curved and parallel walls of the duct at 0°, 22.5°, 45°, 67.5° and 90° measuring sections was measured. All the experimental data has been processed by an Intel i3 CPU, 3 GB RAM PC and analyzed to give the distribution of static pressure in the square duct.The main purpose of this investigation is to show the development of secondary flow which happens when the flow takes place through the bend in the curvature. This secondary flow arises as a result of a centrifugal force acting when the flow moves through the bend. The investigation is carried out at three different velocities 20 m/s, 40 m/s and 60 m/s. The distribution of normalized pressure which is the ratio of static pressure to the dynamic pressure is mapped and shown in the form of contours by using the software package SURFER.The trend of wall static pressure development on the walls of C shaped duct shows that as the flow proceeds towards the curvature, there exists a high pressure gradient between the outside face and inside face due the centrifugal force acting along the curvature. This shows the bulk shifting of flow towards the inside face. This is due to the generation of secondary motion in a plane perpendicular to the primary flow.
Authors and Affiliations
Dipyaman Gangopadhyay, Niraj Kr. Prasad, A. K. Biswas, P. K. Sinha
Keywords
Related Articles
- EP ID EP391138
- DOI 10.9790/9622-0705021720.
- Views 130
- Downloads 0
A Review- Remote Sensing
Now-a-days the field of Remote Sensing and GIS has become exciting and glamorous with rapidly expanding opportunities. Many organizations spend large amounts of money on these fields. Here the question arises why these f...
Design and Analysis of Cooling Tower
Cooling Tower Is A Heat And Mass Transfer Device Commonly Used To Dissipate Heat From Devices Like Condensers In Power Plants, Compressors, Pumps In Industries. Cooling Tower Works On The Principle Of Evaporative Cooling...
Predicting The Mode Of Transportation Using GPS Data, For Vehicular Carbon Footprint Determination
Greenhouse gas emissions by vehicles is damaging the environment. In order to take remedial measures at individual level, one must first know the full scale of damage being done. This study suggests that using GPS data f...
Prediction Of Fluidity Parameter In Thixoforming Process For Aluminum Alloy Using Fuzzy Logic Approach
Thixoforming or semisolid metal processing is an upcoming technology to obtain near net shaped components. The material is processed in between the solidus and liquidus temperatures. This process is also known as thixofo...
Key Issues And Challenges with Web Crawlers
Due to the current size of the Web and its dynamic nature, building an efficient search mechanism is very important. A vast number of web pages are continually being added every day, and information is constantly changin...