Surendra Kumar Yadav

The Study aims towards the examination endeavours achieved in the case of an ejector geometry framework. An ejector is a device used to increase the delivery rate of a fluid. They are used in the refrigeration cycle and the rocket engines as well. It is difficult to understand the flow characteristics of the fluids and the thermodynamic properties of the streams. They can be understood using some computational techniques and tests. The mathematical models for the flow of the fluids inside the ejector are least observed since it is difficult to investigate a fast-moving stream of the fluids inside the ejector. Ejectors have many applications, where heat transfer takes place at a higher rate and also helps create the vacuum. Also, the construction and working, applications, and new advances related to the ejectors. Furthermore, it is observed that there is a special need to investigate various aspects of the ejector. The turn of events history and ongoing advancement in solar ejector refrigeration frameworks are accounted for and arranged.

In engineering systems like jet propulsion, steam turbines, gas turbines, and jet engines, nozzles are crucial parts. They increase the speed of fluid flow from subsonic to supersonic or hypersonic levels, producing the required thrust under certain design and operating circumstances. The efficiency, thrust, and flow rate of the nozzle are determined by its shape and flow characteristics, making its design and analysis essential to the optimization of a variety of engineering systems. In this work, sophisticated propelling nozzles are designed and analysed, with an emphasis on their form and flow characteristics. Nozzle length is taken into account, along with the assumption of constant momentum rate, and 1-D gas dynamic equations are used to examine these variables. The constant rate of momentum change (CRMC) hypothesis, which incorporates frictional effects and heat addition, is utilised to obtain consistent flow characteristics at any distance. The findings of the CRMC theory are validated using computational fluid dynamics (CFD) using ANSYS Workbench 2022R2, which reveals that under design conditions, the numerical conclusions and the CRMC theory results are in agreement.

A usinagem por descarga el trica (EDM) uma tecnologia de usinagem eletrot rmica n o padronizada usada para produzir pe as de materiais geometricamente complexos ou duros que s o altamente desafiadores para usinar por m todos de usinagem tradicionais. Ao acender descargas de fa scas r pidas e repetidas entre a ferramenta e a pe a de trabalho separadas por um espa o estreito de cerca de 0,01 a 0,50 mm, o m todo permite a eros o controlada de materiais eletricamente condutores. Este vazio preenchido com um fluido diel trico, seja por inunda o ou imers o. O objetivo deste estudo avaliar os par metros ideais do processo de usinagem assistida por g s arg nio em material de superliga de a o P91 com cobre como eletrodo de ferramenta e querosene como fluido diel trico. Experimentos foram realizados para determinar a liga o entre os tempos de ativa o e desativa o do pulso de corrente, bem como a taxa de remo o de material e a taxa de desgaste da ferramenta. EDM a g s uma modifica o recente no m todo de usinagem. Neste m todo, a eletroeros o realizada com g s e leo base de querosene, para reduzir a polui o. A maior vantagem da EDM em g s o n vel muito baixo de taxa de desgaste do eletrodo.

This study reports the outcomes of experimental inquiries conducted on hybrid composite samples. The microstructural analysis comprises SEM, EDS, and XRD examinations, exploring the effects of compaction pressure and reinforcements on the microstructure, density, porosity, microhardness, and wear properties of the composites. Additionally, the experimental results are subjected to analysis using the analysis of variance (ANOVA) method. Furthermore, the study includes the presentation of a 3D model of a connecting rod, developed on Solidworks software, taking into account the properties of the Al/3 wt% Si3N4/4.5 wt% ZrO2 composite.

This research investigates 3D scanning technologies and applications. The research begins with an introduction of 3D scanning and its many technologies, such as structured light scanning, laser scanning, and Time-of-Flight (ToF) sensors, photogrammetry. The benefits and drawbacks of each previous design approaches have been studied, and their applicability for various applications. Throughout the study, it was explored various possible applications of 3D scanners, which can be in medicine, the clothing industry, the footwear industry, or the automobile industry. In this project, additive manufacturing has been applied to fabricate the model to get an eco-friendly model. Also, one of the major goals was to reduce the cost of the device to make it affordable for the public. Finally, the fabricated prototype model is able to generate the point cloud for 3D Objects.

Die Elektroentladungsbearbeitung (EDM) ist eine nicht standardm ige elektrothermische Bearbeitungstechnologie, die zur Herstellung geometrisch komplexer oder harter Materialteile verwendet wird, deren Bearbeitung mit herk mmlichen Bearbeitungsmethoden eine gro e Herausforderung darstellt. Durch das Z nden schneller und sich wiederholender Funkenentladungen zwischen Werkzeug und Werkst ck, die durch einen schmalen Spalt von etwa 0,01 bis 0,50 mm getrennt sind, erm glicht das Verfahren die kontrollierte Erosion elektrisch leitf higer Materialien. Dieser Hohlraum wird entweder durch Fluten oder Eintauchen mit einer dielektrischen Fl ssigkeit gef llt. Ziel dieser Studie ist die Bewertung der optimalen Prozessparameter der Argongas-unterst tzten Bearbeitung von P91-Stahl-Superlegierungsmaterial mit Kupfer als Werkzeugelektrode und Kerosin als dielektrischer Fl ssigkeit. Es wurden Experimente durchgef hrt, um den Zusammenhang zwischen den Ein- und Ausschaltzeiten des Stromimpulses sowie der Materialabtragsrate und der Werkzeugverschlei rate zu ermitteln. Das Erodieren in Gas ist eine j ngste Modifikation der Bearbeitungsmethode. Bei dieser Methode wird EDM mit Gas und l auf Kerosinbasis durchgef hrt, sodass die Umweltverschmutzung reduziert wird. Der gr te Vorteil von EDM in Gas ist die sehr geringe Elektrodenverschlei rate.

La lavorazione con elettroerosione (EDM) una tecnologia di lavorazione elettrotermica non standard utilizzata per produrre parti geometricamente complesse o in materiale duro che sono estremamente difficili da lavorare con i metodi di lavorazione tradizionali. Accendendo scariche di scintille rapide e ripetute tra l'utensile e il pezzo da lavorare separati da uno stretto spazio compreso tra circa 0,01 e 0,50 mm, il metodo consente l'erosione controllata di materiali elettricamente conduttivi. Questo vuoto viene riempito con un fluido dielettrico, mediante allagamento o immersione. L'obiettivo di questo studio valutare i parametri di processo ottimali della lavorazione assistita da gas Argon su materiale in superlega di acciaio P91 con rame come elettrodo dell'utensile e cherosene come fluido dielettrico. Sono stati condotti esperimenti per determinare il collegamento tra i tempi di attivazione e disattivazione dell'impulso corrente, nonch la velocit di rimozione del materiale e la velocit di usura dell'utensile. L'elettroerosione a gas una modifica recente nel metodo di lavorazione. In questo metodo, l'elettroerosione viene eseguita con gas e olio a base di cherosene, in modo da ridurre l'inquinamento. Il pi grande vantaggio dell'EDM nel gas il livello molto basso di usura dell'elettrodo.

L'usinage par lectro rosion (EDM) est une technologie d'usinage lectrothermique non standard utilis e pour produire des pi ces g om triquement complexes ou en mat riaux durs qui sont tr s difficiles usiner par les m thodes d'usinage traditionnelles. En allumant des d charges d' tincelles rapides et r p t es entre l'outil et la pi ce travailler s par es par un espace troit d'environ 0,01 0,50 mm, la m thode permet l' rosion contr l e des mat riaux lectriquement conducteurs. Ce vide est rempli d'un fluide di lectrique, soit par inondation, soit par immersion. Le but de cette tude est d' valuer les param tres de processus optimaux d'usinage assist par gaz argon sur un mat riau superalli d'acier P91 avec du cuivre comme lectrode d'outil et du k ros ne comme fluide di lectrique. Des exp riences ont t r alis es pour d terminer le lien entre les temps d'activation et de d sactivation de l'impulsion de courant, ainsi que le taux d'enl vement de mati re et le taux d'usure des outils. L'EDM au gaz est une modification r cente de la m thode d'usinage. Dans cette m thode, l'EDM est r alis e avec du gaz et du p trole base de k ros ne, afin de r duire la pollution. Le plus grand avantage de l'EDM dans le gaz est le tr s faible taux d'usure des lectrodes.