Automation and Autonomous Systems

M. Suresh ¹, R. Hari Prakash ², B. Durga Prasad ³

Affiliations
1 Jawaharlal Nehru Technological University, Anatapur, IN
2 Birla Institute of Technology, Ranchi, IN
3 Department of Mechanical Engineering, JNTUA, Anantapur, IN

Abstract

Direct injection spark ignition (DISI) engines have a large potential to reduce emissions and specific fuel consumption. One of the most important problems in the design of DISI engines is the cycle-to-cycle variations of theflow, mixing and combustion processes. The Large Eddy Simulation (LES) based analysis is used to characterize the cycle-to-cycle fluctuations of the flow field as well as the mixture preparation in a realistic four-stroke internal combustion engine with variable charge motion system. Based on the analysis of cycle-to-cycle velocity fluctuations of in-cylinder flow, the impact of various fuel spray boundary conditions on injection processes and mixture preparation is pointed out. The joint effect of both cycle-to-cycle velocity fluctuations and variable spray boundary conditions is discussed in terms of mean and standard deviation of relative air–fuel ratio, velocity and mass fraction. Finally a qualitative analysis of the intensity of cyclic fluctuations below the spark plug is provided.

Keywords

Large Eddy Simulation (LES), Cyclic Variations, Direct Injection Spark Ignition (DISI), Internal Combustion Engine, Air–Fuel Mixing, Fuel Spray Injection.

Full Text

     

M. K. Thara ¹, M. Suresh ², L. Sheela ³

Affiliations
1 Anna University, Chennai-25,Tamil Nadu, IN
2 Fluid Control and Research Institute, Kanjikode, IN
3 Anna University, Chennai-25, Tamil Nadu, IN

Abstract

Across the world, electric utilities are deploying smart meters also known as AMI (Automated Metering Infrastructure) to their residential customers and industrial applications. Smart meters provide two-way digital communications between the utility and the customer. Thus, enabling, customer energy management and demand response via both information and rate programs. Utility operational advantages such as outage detection and management, remote meter reading, and remote customer connections are possible by smart meters. Smart meter deployment causes controversies regarding mainly health, privacy and cost. Traditional measurement system met with lot of difficulties in terms of estimated billing and energy wastage. A measurement system lying in between Smart meters and traditional meter reading system is proposed here. Android is the first truly open and comprehensive platform for mobile devices. It is an open-source development platform for creating mobile applications. This application contains OCR (Optical Character Recognition), barcode reader and data transfer applications. A prototype measuring system using Android hand held device is developed. Meter Identity and reading is two important parameters for any measurement system. These two parameters are captured and stored in android data base for future analysis. The consumer data base and meter readings can be exported to PC. A SQlite(Structured Queried Language) data base also created in the PC. Data base can be converted in to CSV (Comma Separated Values) files and can be exported to android device. OCR is the mechanical or electronic translation of scanned images of handwritten, typewritten or printed text into machine-encoded text.

Keywords

AMI, CSV, OCR, SQL.

Full Text