The impact of in-cylinder conditions on a turbocharged gasoline pre-chamber ignited engine

Turbulent Jet Ignition is a novel ignition technology that has demonstrated high thermal efficiency, especially at full loads, for lean burn IC engine applications. This technology has been extensively utilised in high speed motorsport engines such as Formula 1 and LMP1 where fuel flow rate is restricted thus driving motorsport engine manufacturers to improve fuel conversion efficiency making turbulent jet ignition technology very attractive for motorsport application. Thermal efficiency figures of over 50% have been claimed by certain Formula 1 engine manufacturers, however, the products of R&D are seldom publicised which make it difficult for novel technologies to enter the passenger car industry where improving fuel efficiency is critical to reduce global tailpipe emissions to protect the environment. Over the years, numerous researchers have studied the turbulent jet ignition system however limited knowledge exists on the impact of in-cylinder conditions on the jet ignition system. This research focuses on studying the impact of in cylinder flow via port design, piston crown shapes and studying the impact of compression ratio and backpressure on a pre-chamber ignition system on a turbocharged lean burn high speed gasoline powered motorsport engine operated at full load conditions. Research findings include discovery of positive impact of tumble flow on main-chamber combustion processes, a novel piston crown design which assists combustion processes via prechamber enrichment and enhancing main-chamber tumble flow. A positive impact of increasing compression ratio and the diminishing effect of increasing residual concentration on combustion have been discussed

Design and fabrication of a data logger for atmospheric pressure, temperature and relative humidity for gas-filled detector development

A novel instrument has been developed to monitor and record the ambient pa- rameters such as temperature, atmospheric pressure and relative humidity. These parameters are very essential for understanding the characteristics such as gain of gas filled detectors like Gas Electron Multiplier (GEM) and Multi Wire Propor- tional Counter (MWPC). In this article the details of the design, fabrication and operation processes of the device has been presented.Comment: 11 pages, 12 figure

Detection of hidden structures on all scales in amorphous materials and complex physical systems: basic notions and applications to networks, lattice systems, and glasses

Recent decades have seen the discovery of numerous complex materials. At the root of the complexity underlying many of these materials lies a large number of possible contending atomic- and larger-scale configurations and the intricate correlations between their constituents. For a detailed understanding, there is a need for tools that enable the detection of pertinent structures on all spatial and temporal scales. Towards this end, we suggest a new method by invoking ideas from network analysis and information theory. Our method efficiently identifies basic unit cells and topological defects in systems with low disorder and may analyze general amorphous structures to identify candidate natural structures where a clear definition of order is lacking. This general unbiased detection of physical structure does not require a guess as to which of the system properties should be deemed as important and may constitute a natural point of departure for further analysis. The method applies to both static and dynamic systems.Comment: (23 pages, 9 figures