The purpose of the paper is to study heat transfer in exhaust manifold a naturally aspirated diesel engine. work started from test engine D30 which was redesigned CATIA V5, then pre-processed Comsol Multiphysics. results post-processing phase have generated temperature, velocity, pressure, and Reynolds number fields were compared with experimental data dynamometric test. For higher accuracy, te...

Software traceability and its subsequent impact analysis help relate the consequences or ripple-effects of a proposed change across different levels of software system. Our software traceability approach can be observed at its ability to integrate the high level with the low level software models of object-oriented software that include the requirements, test cases, design and code. It supports...

In this paper one class of anthropomorphic modular reconfigurable grippers for robots are described , including a prototype. For the first time the stages of synthesis, analysis design and functional simulation are presented. We choice two versions: with three and four identical fingers with three phalanxes on finger. The kinematic synthesis is used to obtain a correct closing of the finger and...

The aim of this numerical work is to analyze the effect of the position of the swimmer's head on the hydrodynamic performances in swimming. In this initial study, the problem was modeled as 2D and in steady hydrodynamic state. The geometry is generated by the CAD software CATIA and the numerical simulation is carried out by the use of the CFD Fluent code. The standard k-epsilon turbulence model...

This work presents an innovative approach to the solid model comparison problem which aims to detect and extract all geometric differences between two successive versions of the same part. The automatic model comparator has been developed to offer a standardized information about solid model evolutions to all engineering teams concurrently involved in the product development process. The compar...

The paper presents researches in the field of increasing the efficiency of the solar energy conversion in electric energy. The idea is to design a dual-axis tracking system, which changes the position of the photovoltaic panel in order to maximize the solar radiation degree of use. The daily motion is driven by a rotary motor, and for the seasonal motion a linear actuator is used. The tracking ...

Abstract—Liquid spray heat exchanger is the critical equipment of temperature regulating system by gaseous nitrogen which realizes the environment temperature in the range of -180 °C~+180 °C. Liquid nitrogen is atomized into smaller liquid drops through liquid nitrogen sprayer and then contacts with gaseous nitrogen to be cooled. By adjusting the pressure of liquid nitrogen and gaseous nitrogen...

In this study, three wheels personal electric vehicle system has been conducted with two 250-Watt reduction gear dc motors. The can move front, back, left, and right sides according to the rider's directions. directions which speed turning movement have provided 2 different potentiometers vehicle. To understand carrying capacity of mechanical analysis realized Catia Computer-Aided Drawing Softw...