Surendra Kumar Yadav

Um bico um dispositivo mec nico concebido para controlar a taxa de fluxo, a velocidade, a dire o e a press o do fluxo que passa atrav s dele. Existem v rios tipos de bocais que s o utilizados. Num bocal, a velocidade do fluido aumenta custa da sua energia de press o. O bocal, especificamente, um dispositivo que desenvolvido e projetado para controlar a dire o do fluido que flui em qualquer movimento, o papel principal do bocal controlar as caracter sticas do fluxo de fluido, tal como aumentar a velocidade medida que este sai da c mara de um sistema propulsivo. Nesta tese, a an lise de Din mica de Fluidos Computacional (CFD) estuda um bocal supers nico de rea vari vel com efeitos de fric o. O objetivo da investiga o encontrar formas de melhorar o desempenho dos sistemas de tubeiras. Esta investiga o centra-se principalmente na conce o e an lise de bocais CRMC com efeito de fric o. Os resultados s o apresentados com base em contornos e gr ficos. Um gr fico representa a an lise e o CFD. Como observado a partir dos resultados, o n mero de Mach aumenta com o aumento da dist ncia axial ao longo do bocal CRMC.

Une buse est un dispositif m canique con u pour contr ler le d bit, la vitesse, la direction et la pression du flux qui la traverse. Il existe diff rents types de buses. Dans une buse, la vitesse du fluide augmente au d triment de son nergie de pression. La tuy re est un dispositif d velopp et con u pour contr ler la direction du fluide qui s' coule dans un mouvement quelconque. Le r le principal de la tuy re est de contr ler les caract ristiques de l' coulement du fluide, tout comme d'augmenter la vitesse lorsqu'il sort de la chambre d'un syst me propulsif. Dans cette th se, l'analyse CFD (Computational Fluid Dynamic) permet d' tudier une tuy re supersonique surface variable avec des effets de frottement. L' tude vise trouver des moyens d'am liorer les performances des syst mes de tuy res. Elle se concentre principalement sur la conception et l'analyse d'une tuy re CRMC avec effet de frottement. Les r sultats sont pr sent s sous forme de contours et de graphiques. Un graphique repr sente les r sultats de l'analyse et de la CFD. Les r sultats montrent que le nombre de Mach augmente avec la distance axiale le long de la tuy re CRMC.

Eine D se ist eine mechanische Vorrichtung, die dazu dient, die Durchflussmenge, die Geschwindigkeit, die Richtung und den Druck des durch sie austretenden Stroms zu steuern. Es gibt verschiedene Arten von D sen, die verwendet werden. In einer D se erh ht sich die Geschwindigkeit der Fl ssigkeit auf Kosten ihrer Druckenergie. Die Hauptaufgabe der D se besteht darin, die Eigenschaften der Fl ssigkeitsstr mung zu steuern, ebenso wie die Geschwindigkeit beim Austritt aus der Kammer eines Antriebssystems zu erh hen. In dieser Arbeit wird die Computational Fluid Dynamic (CFD)-Analyse zur Untersuchung einer berschalld se mit variablem Querschnitt und Reibungseffekten durchgef hrt. Ziel der Untersuchung ist es, Wege zur Verbesserung der Leistung von D sensystemen zu finden. Der Schwerpunkt liegt dabei auf dem Entwurf und der Analyse einer CRMC-D se mit Reibungseffekt. Die Ergebnisse werden konturenbasiert und grafisch dargestellt. Ein Diagramm stellt die Ergebnisse der Analyse und des CFD dar. Aus den Ergebnissen geht hervor, dass die Machzahl mit zunehmendem axialen Abstand entlang der CRMC-D se steigt.

The workplace is a complex ecosystem where individuals from diverse backgrounds converge, each bringing their unique perspectives, motivations, and behaviours. "Harmony in the Workplace: Unravelling the Dynamics of Organizational Behaviour" delves into the intricacies of organizational behaviour to understand the underlying mechanisms that contribute to fostering harmony within a work environment. This study examines the interplay of various factors such as leadership styles, communication patterns, conflict resolution strategies, and organizational culture to elucidate how they influence employee interactions and overall organizational cohesion.

The present report shows the performance analysis of a household LPG (liquefied petroleum gas) burner incorporated with porous media consisting of metal balls and metal chips. The thermal efficiencies of a conventional household LPG burner with and without the usage of porous media were compared. With the usage of porous media, the maximum thermal efficiency of the burner was found to be 72.2% which is generally in the range of 64-67% for a conventional LPG burner. Similarly, the temperature distribution across the burner surface was found to be more uniform when porous media was used. The temperature difference across the burner surface in normal condition was around 300 C whereas using porous media it was decreased to around 100 C. Also, the energy cost was found to be less with the use of porous media in the burner. A maximum 5.3% saving in energy cost was found with the use of porous media.

This Book is the design of a small-scale working model hovercraft which providing fully hovercraft basic functions. This final year project carries out by us to fulfillment the requirement for award the degree of Bachelor of technology in mechanical Engineering. The air cushion vehicle or "HOVERCRAFT", as it is popularly known is the newest vehicle in today 's transport scene. As well as being new, this vehicle is different from other more conventional, terrestrial vehicle in that it requires no surface contact for traction, and it can move freely over a variety of surface while supported continuously on a self-generated cushion of air. Though the concept is new, the rate of development of hovercraft has been outstandingly faster than that of any other mode of transport.

In recent years, significant advancements have been made in the field of engineering materials, driven by the relentless pursuit of improved performance, durability, and sustainability. This abstract highlight key breakthroughs across various material categories, including metals, polymers, ceramics, and composites. Novel manufacturing techniques, such as additive manufacturing and nano structuring, have enabled the production of materials with tailored properties, fostering innovation in diverse applications ranging from aerospace to biomedical devices. Additionally, a focus on eco-friendly materials and processes underscores a paradigm shift toward sustainable engineering practices, reflecting a commitment to mitigating environmental impact. The integration of smart materials and the advent of responsive structures have further expanded the horizon of engineering materials, allowing for adaptive and self-healing functionalities. This abstract explores the interdisciplinary nature of recent research, emphasizing the collaborative efforts of materials scientists, engineers, and researchers in pushing the boundaries of traditional materials limitations.

This Book provides a thorough investigation of Vapour Absorption Refrigeration Systems (VARS), covering multiple crucial elements throughout six chapters. Readers are introduced to the various types of absorbers used in Variable Amplitude Refrigeration Systems (VARS). The chapter also provides a detailed explanation of the thermodynamic and thermo-physical properties of different combinations of refrigerants and absorbents. The book provides a comprehensive literature review that examines the impact of operating temperatures, the efficiency of components, and the studies on heat and mass transfer of absorbers. The comparative analysis of VARS (Vapour Absorption Refrigeration Systems) based on HFC (Hydrofluorocarbon) and HCFC (Hydrochlorofluorocarbon) revealed that the R134a-DMAC combination and the falling film absorption mode are highly promising for absorbers.