The present paper discusses film cooling behavior through numerical simulation in the presence of a twisted tape insert inside hole. imparts swirl to coolant flow. Coolant intensity is controlled by varying pitch resulting numbers 0.0289, 0.116, and 0.168. performance evaluated using area-averaged effectiveness heat transfer coefficient for blowing ratios 0.5, 1.0, 1.5, 2.0. Results revealed si...

The potential of Palm Methyl Esters (PME) as an alternative fuel for gas turbines is investigated using a swirl burner. The main air flow is preheated to 623 K and a swirling spray flame is established at atmospheric pressure. The spray combustion characteristics of PME are compared to diesel and Jet-A1 fuel under the same burner power output of 6 kW. Investigation of the fuel atomizing charact...

Important new features are found for a family of swirling jets with velocity v;z, where z is the distance from the jet origin. First, there is a sharp minimum of the pressure coefficient at a certain value of the swirl number Sw which is nearly n independent; this feature can be utilized in technological devices. Second, as Sw increases, a separation zone develops, where the fluid is not at res...

This paper explores the effect of inlet flow modifcation on the cavitating and noncavitating performance of two cavitating inducers, one of simple helical design and the other a model of the low-pressure LOX pump in the Space Shuttle Main Engine. The modifications were generated by sections of honeycomb, both uniform and nonuniform. Signifcant improvement in the performance over a wide range of...

Very complex flow structures occur during separation that can appear in a wide variety of applications involving flow over a bluff body. This study examines the ability to detect the dynamic interactions of vortical structures generated from a Helmholtz instability caused by separation over bluff bodies at large Reynolds number of approximately 104 based on a cross stream characteristic length ...

We investigate the organization of traffic flow on preexisting uniand bidirectional ant trails. Our investigations comprise a theoretical as well as an empirical part. We propose minimal models of uniand bidirectional traffic flow implemented as cellular automata. Using these models, the spatio-temporal organization of ants on the trail is studied. Based on this, some unusual flow characteristi...