New Innovation of Combustion Chamber by Rotating Components Using CFD Tool

Fuel conservation is very important and popular subject given today’s concern for the operating cost economics in the aviation industry. Several techniques based on energizing the performance, or using in-time modifications of the engine combustion chamber will be studied in this project. This second approach on new designing of combustion chamber by rotational component seems to be promising. Considering a commercial aircraft for example, enhancing the engine regime by using combustion chamber by new innovative ideas and thereby increasing air fuel mixing ratio would most likely lead to fuel economy. Then the various dimensions of the combustor are calculated based on different empirical formulas. The air mass flow is then distributed across the zones of the combustor. The whole combustion chamber is modeled using Gambit, a modeling software and presented. The model is then analyzed using various parameters at various stages and levels to determine the optimized design. The aerodynamic flow characteristics are simulated numerically by means of fluent software suite. This project focuses on the design of a structure for an experimental combustion chamber, which will be studied using the computational fluid dynamic analysis

Invariant elliptic curves as attractors in the projective plane

Let f be a rational self-map of P^2 which leaves invariant an elliptic curve C with strictly negative transverse Lyapunov exponent. We show that C is an attractor, i.e. it possesses a dense orbit and its basin is of strictly positive measure

Nutrient Transient Storage by the Invertebrate Assemblage in Streams with Contrasting Nutrient Loads

Ecological processes occurring at the water-sediment interface have major effects on the dynamics of nutrients in low order streams. Nutrients are removed from the water column by microbial biofilms that, in turn, are consumed by the invertebrate assemblage. In this study we estimated the amount of elements (C, N, P) that flow through the invertebrate assemblages of several streams throughout Europe, all of them impacted by wastewater treatment plants. Our approach coupled secondary production estimates with elemental measures of C, N, P content of invertebrate taxa. This research is part of the EU-project STREAMESJRC.H.5 - Rural, water and ecosystem resource