Numerical investigation on flow field characteristics of integral particle separator
This paper is a study and research result of vane less integral particle separator where numerical simulation of its inner flow field and the particle movement locus characteristic was undertaken with the application of calculation software Fluent. This paper obtains the characteristic of the total pressure loss from the inlet to the clearance stream outlet and the main stream outlet while the SCR differs, and its inner flow field, and also the distribution of total pressure loss at the clearance stream outlet and particle movement locus. The calculation was undertaken by using the Realizable k-ε model and using Lagrange track model for discrete phase. The research result shows: In the clearance stream, the fluid appears of the whirlpool structure. The total pressure loss decreases while the SCR increases, and increases as the main stream flow increases. On the inner side at the clearance stream outlet (near the splitter), the total pressure loss decreases as the SCR increases, while in the outer side (near the outer wall), the total pressure loss increases as the SCR increases. In the main stream, the total pressure loss increases as the SCR and the main stream flow increase. Micro-size particles barely collide with wall, and some of them enter the main stream flow, while most of large grain size particles collide with wall and enter the clearance stream where they are discharged.
INVESTIGATION OF FLOW CHARACTERISTICS OF SOLID-GAS TWO PHASE FLOW IN TWO-DIMENSIONAL STRAIGHT PASSAGE
In this paper the two-dimensional straight passage experimeat has been done. Pulsesheet-laser, television camera and image technique is used for measuremeat of the flow parameters in fixed quantity. A detailed experimental investigation has been carried out and the velocity, direction and flow structure of solid particle have been obtained. Meanwhile the new collide regular pattern are shown between solid particle and the wall with several inlet velocity of gas and several wall angles of inclination. A new interaction formula has been provided.
Design of a compact and economical remotely operated vehicle for aquatic monitoring
There is a major need for underwater technology for monitoring marine archaeology in a peninsular country like India. In this paper, a compact and economical observation-class remotely operated vehicle (ROV) has been designed and developed for aquatic monitoring and underwater surveys, primarily for archaeological purposes. The ROV is capable of operating at depths of 100ft. It has a USB camera for its vision and can be operated from a surface vehicle whose GPS location is geo-tagged on the video, recorded by the camera. Such an arrangement will help in informing the archaeology department about artifacts that are found in various GPS locations. To eliminate the problem of drag due to heavy tether, a two-wire tether has been implemented using the concept of powerline communication, which serves as the communication link between the ROV and the surface vehicle. The two-wire tether also enables faster video transmission. The control panel of the ROV is a PHP-based graphical user interface (GUI) which is capable of recording and displaying the sensor data. The ROV has been named as ‘ROV CHOLAN’, to commemorate the Chola dynasty (300s BCE – 1279 CE) as the artefacts it may find will belong to that period.