Thermoacoustic (TA) heat engines are engines which convert heat into acoustic power. This relatively new class of heat engines gains commercial interest, because of their low number of moving parts and high potential efficiency [1]. Especially traveling wave thermoacoustic engines are capable of reaching this high efficiency, because traveling wave engines perform a thermodynamic cycle similar ...

© Agilent Technologies, Inc. February 25 2008 www.agilent.com/chem/icpms to concentrations in biogas, assuming standard sample collection techniques, the resulting detection limits ranged from 0.03 0.07 ppbv (parts per billion by volume), which is 100x lower than the most stringent engine manufacturers requirements and more than 500x more sensitive than the lowest reported GC/MS detection limit.

A vehicular driveline is the system used to transfer engine torque to the wheels. Resonances in the elastic parts of the driveline are important to handle when control of the engine and the transmission is optimized. Gear shifting by engine control is a new approach for automatic gear shifting with disengaging the clutch replaced by engine control. Resonances are excited in an uncontrolled driv...

Based on damage data owned by PT XYZ, the compressor engine that has a history of high is D32 CP8 Compressor Engine. Critical components CP 8 are determined using risk matrix. The critical selected from Engine Screw Motor, Refrigerant Air Cooler, and Cylinder Bearing Oil Cooler. This study uses Reliability Centered Spares (RCS), Min-Max Stock, Reorder Point (ROP) methods. collection processing ...

Infrared (IR) and Differential Scanning Calorimetric (DSC) analytical tests have been used to study the change in diesel engine oil properties during performance, addition changes physical chemical properties. Two types of oils (petroleum base) that are bus vehicles were examined engines travelling distances up 5000 km. The results show characterization as composition with increase. Also, take ...

this paper is the representation of the computational and experimental methods of a new injector nozzle for a sequential port injection cng engine. the objective of this study was to review the previous research in the development of gaseous fuel injector for port injection cng engine converted from diesel engine. next, a simulation of the fuel flow of the new injector nozzle was made using flu...

In many product areas, a growing trend can be observed towards variant design, i.e. the development of customized designs based on variations of mature product models. We have developed a Virtual-Reality (VR) system for variant design that supports the real-time scaling and subsequent simulated assembly of hierarchical, CSG-like parts. An XML-based format, VPML, serves as description for the sc...

Rapid Prototyping is a versatile method to build complex-shaped ceramic or metallic parts on a mesoscopic scale. In this work the fabrication of ceramic gas turbine engine parts with Mold Shape Deposition Manufacturing (Mold SDM) is described. Mold SDM exists of two steps: The pattern generation in wax using deposition and machining of wax layers and the pattern transfer process with gel-castin...

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As the analysis tool the well-known commercial software package (FINE/Design3D) is used. As the optimization software IOSO PM (parallel algorithm of IOSO) is used. The prospect presents the results of optimizing a three-stage axial compressor. The optimization goal was to improve the compressor efficiency at two flight conditions by optimizing geometry of the 5 compressor rows (62 design parame...