Crimson Publishers-Mechanical Engineering

On Acoustic Properties of Duct Termination Exhausting Hot Flow by Utilizing FEM Simulation by Hans R in Evolutions in Mechanical Engineering_ Element Method Abstract Determination of the acoustical properties for hot flow duct openings is a classical problem in acoustics. The importance of this issue usually becomes apparent when Noise Radiation from engine exhaust systems or burner chimneys is considered. In the paper a Finite Element Method (FEM) simulation has been applied to investigate the effects of high temperature media on the sound propagation through open duct termination. This paper is an extension for the recent experimental work performed by paper authors on acoustical properties of duct terminations exhausting hot gas. In order to simulate the experimental conditions, commercial FEM software COMSOL has been used. The acoustic pressure reflection coefficient of the duct termination is calculated from the complex pressure values simulated at the location of two microphon...

Delay-Induced Synchronization on a Network of Euler’s Beams Indirectly Interconnected Via Piezoelectric Patches by Nana Nbendjo BR* in Evolutions in Mechanical Engineering_ Amplitude Death   Abstract In this paper, Amplitude Death (AD) phenomenon is reported in a network of Euler’s beams in- directly coupled via an electrical circuit consisting of piezoelectric patches. AD phenomenon appears in this system when global synchronization of all beams takes place. The occurrence of global synchronization, which was preceded by dynamical clustering, is dependent on the size of the network as well as on the load resistance of the electrical circuit which indirectly interacts with all the beams. The results further show that the AD state can be observed for relatively very weak coupling strength and large system-size. For more open access journals in  Crimson Publishers  Please click on link:  https://crimsonpublishers.com/ For more Articles on  Amplitude Death ...

Vacuum Treatment of Metal in the Process of Continuous Casting by Protasov AV* in Evolutions in Mechanical Engineering_ Vacuum Treatment Mini Review One of the promising areas of liquid steel processing is the development of metal vacuum treatment in the stream during continuous casting (flow Vacuum Treatment ). Several technological schemes of such processes have been developed, however, in practice, the only variant of the process has been implemented at the conditions of converter shop No-2 of Novo-Lipetzk Metallurgical Combine (NLMC) (Figure 1). The technology of flow vacuuming is based on the theoretical works of Professor G A Sokolov [1]. A steel ladle with a special jointing element covering the slide valve is installed on the supports of the CCM, then the hydraulic cylinder is attached to slide valve and the compressed air is given to assembling device.Then the slide valve is opened and vacuum chamber with the help of hydrocylinders is lifted to connecting with the ladle, whi...

  Is Rheology a Concern in GI Physiology? by Ravi Kant Avvari* in Evolutions in Mechanical Engineering_ Rheology Concern Introduction The small intestine is part of the gastrointestinal tract that interconnects the stomach at one end to the large intestine at the other end. As the bolus containing meal traverses the intestinal segments it undergoes rheological transformation as a consequence of digestive processes such as alkaline buffering, micelle formation, absorption of nutrients and water [1]. As the chyme (mixture of meal and gastric juice) enters the stomach through the pylorus (a valve interconnecting the stomach and the small intestine), the duodenum (first segment of the small intestine) responds to the acidic content of the chyme by buffering them with alkaline secretion of pancreas. Buffering action results in lowering the pH value of the contents, so the meal can be processed for further breakdown. Mucus secretion (a thick protective fluid) by the duodenal mucosa helps...

An Investigation into a Spring Based Ankle Joint Designed for Lower Limb Prosthesis by Sayem Hossain Bhuiyan* in Evolutions in Mechanical Engineering_  Ankle Joint Abstract A spring based Ankle Joint is designed to improve the performance of mechanical type prostheses. The torsional and compression springs with the help of some foot plate arrangement is used to enable the prosthesis in producing desired flexion and extension and also storing and returning energy by the ankle joint during the gait cycle. The motion analysis and Finite-Element Analysis (FEA) of ankle joint components are carried out to assess the feasibility of the design. The FEA results are then compared with the real data obtained from the literature for a similar subject. The pattern of motion analysis results has shown a great resemblance with the gait cycle of a healthy biological limb, and the design is identified to be safe with factory of safety of 1.9 from the FEA results. For more open access journals in...

Cognitive Automation and its Impact on Additive Manufacturing by Albert Jones* in Evolutions in Mechanical Engineering_ Cognitive Automation Abstract The English word manufacturing firstly appeared in 1683 and it was derived from Latin manu factus, meaning making by hand. For more than thousands of years now, and four Industrial Revolutions, the physical, and mostly mechanical processes, associated with making things have evolved substantially. That evolution, which we call physical automation, essentially changes manufacturing from making by- humans hand only to making-by-machine only.A similar evolution is taking place with the cognitive processes that occur as part of design, engineering, the manufacturing, control, and inspection.We call that evolution cognitive automation. In this paper, we provide a history of both physical and cognitive automation.That history evolves based on summaries of the four industrial Revolutions.The focus of this paper is on the current state of cogniti...

  Opportunities, Advances and Challenges of Hydrogen micro Gas Turbines by Cedric Devriese in Evolutions in Mechanical Engineering_ Renewable Energy Abstract  When green hydrogen becomes more prevalent for the buffering of Renewable Energy , one way to utilize this hydrogen is to use it in a small gas turbine. The units proposed in this article would be part of a flexible, modular, scalable, robust, easily maintainable and economically viable solution for large-scale grid balancing, small-scale combined heat and power and ultra-low emission transportation.    For more open access journals in  Crimson Publishers  Please click on link:  https://crimsonpublishers.com/ For more Articles on  Renewable Energy   Please click on:  https://crimsonpublishers.com/eme/ https://crimsonpublishers.com/eme/fulltext/EME.000559.php Follow On Publons  :  https://publons.com/publisher/6342/crimson-publishers Follow On Linkedin :  https:/...