Damping element to reduce noise caused by steam venting


tlumic

With power generators, it is sometimes necessary to vent steam to reduce pressure in the system. This venting is done through a device that consists of a safety valve and muffler. The muffle’s primary function is to reduce the pressure in the system to permissible levels. Due to highly turbulent changes during this process, acoustic emissions are generated. If the muffler is located close to populated areas, it is necessary to reduce the level of acoustic emissions as much as possible to a level permitted by health standards. The noise generated in the muffler can be predicted using CFD simulations and reduced through design optimization.

 

Research and development of a “G-Cooling System” (GCS) braking system


GCS_Obr1

Today, conventional air-cooling of disc brakes occurs by ventilated and perforated discs. These brake systems attempt to maximize the heat transfer surface area through the shape of the brake’s disc. GCS braking systems are additionally equipped with a special cover (diffuser) that utilizes the air’s kinetic energy at the disc’s outlet and drives the cooling air through the disc (through transverse holes) one more time to increase cooling effect. With brakes, cooling is a priority because even the best friction materials have temperature limits. In addition to its cooling function, the diffuser also performs a protection function and protects brakes against the effects of abrasive particles such as water, snow, salt, dust, etc.. This extra protection further increases the efficiency and service life of brakes. GCS braking system is a new concept suitable mainly to racing cars, where extreme need for brake system cooling is requested. The system is suitable for application with steel, carbon or carbon/ceramic disc brake systems. This system was initially developed for Formula 1 racing cars, but it can also be applied for cars in general.

 

A sensor for measuring the temperature of motor flue gases


continental

The main criteria in designing a sensor for measuring the temperature of exhaust gases are accuracy and the shortest possible starting time. Thermodynamic CFD simulations have enabled developers to make a number of calculations that have made it possible to design a sensor that meets the respective requirements. The proper design of such sensor with a short starting time requires the developers to know the heat-transfer coefficient between the sensor and circumfluent exhaust gases. Using conventional methods based on previous experience and experimental measurements to determine precisely this coefficient is very expensive and time consuming. Mathematical modelling and high performance computing systems, however, can significantly speed up the entire process and thus substantially reduce the costs associated with development.

 

Biomechanics


biomechanika

When solving orthopaedic problems, it is important to know the mechanical properties of bones. These are mainly given by their complex internal structure that can be determined using computer tomography. The manner in which knowledge about the mechanical properties of bones is discovered is as follows: based on computer tomography results and known properties of individual components, it is possible to create a mathematical model of a representative volume that can be used for simulating various types of load and counting responses. This replaces conventional mechanical tests of materials that are destructive and therefore impractical. The use of mathematical modelling and high-performance parallel computing techniques together with computer tomography allows for the analysis of mechanical properties and the optimization of materials with complex internal structures.

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