Flow Development through a Duct and a Diffuser Using CFD
Journal Title: International Journal of engineering Research and Applications - Year 2017, Vol 7, Issue 1
Abstract
In the present paper an extensive study of rectangular cross-sectioned C-duct and C-diffuser is made by the help of 2-D mean velocity contours. Study of flow characteristics through constant area duct is a fundamental research area of basic fluid mechanics since the concepts of potential flow and frictional losses in conduit flow were established. C-ducts are used in aircraft intakes, combustors, internal cooling systems of gas turbines, ventilation ducts, wind tunnels etc., while diffuser is mechanical device usually made in the form of a gradual conical expander intended to raise the static pressure of the fluid flowing through it. Flow through curved ducts is more complex compared to straight duct due to the curvature of the duct axis and centrifugal forces are induced on the flowing fluid resulting in the development of secondary motion (normal to the primary flow direction) which is manifested in the form of a pair of contra-rotating vortices. For a diffuser in addition to the secondary flow, the diverging flow passage, which causes an adverse stream wise pressure gradient, can lead to flow separation. The combined effect may result n non uniformity of total pressure and total pressure loss at the exit. A comparative study of different turbulent models available in the Fluent using y as guidance in selecting the appropriate grid configuration and turbulence models are done. Standard k-ε model and RSM models are used to solve the closure problem for both the constant area duct and the diffuser. It has been observed that the Standard k-e model predicts the flow through the constant area duct and the diffuser within a reasonable domain ofthe y range.
Authors and Affiliations
Prasanta K. Sinha, A. K. Biswas, A. N. Mullick, B. Majumdar
Keywords
Related Articles
- EP ID EP389867
- DOI 10.9790/9622-0701044654.
- Views 159
- Downloads 0
Efficacy of Ceramic Candle Filters in the Removal of Bacteria and Enteroparasites
This study aimed to evaluate the efficacy of ceramic candle filters (CCF) used for domestic purification of water. They are considered cheap and in the past were very popular in Brazil. The efficiency of this system to r...
Comparative Analysis Of Total Polyphenol Content, Total Flavonoid Content And Antioxidant Potential Of Four Colored Flesh Potato Genotypes And Some Berries Fruits
Antioxidants contained in vegetables and fruits are important for preventing the oxidative damages produced by free oxidant radicals, having a positive impact on the human health. Potato tubers with colored flesh contain...
An Improved Personal Security System
In current period an enormous rise in crime against women can be observed and along with women even children, old age people are also suffering with inhuman activities as kidnapping. Women feel insecure roaming around th...
On Simple Ternary 𝚪-Semiring
In this paper, the terms, simple ternary Γ-semiring, semi-simple, semisimple ternary Γ-semiring are introduced. It is proved that (1) If T is a left simple ternary Γ-semiringor a lateral simple ternary Γ-semiring or a ri...
The Effect of Using a Modified A/C System on the Cooling System Temperature of an Internal Combustion Engine
This study investigates the effect of using A/C refrigerant to reduce the temperature of the coolant in a vehicle cooling system. An increase in coolant temperature due to harsh working conditions increases fuel consumpt...