Engineering Journal

Wednesday, December 2, 2020

Heat Transfer Characteristics of a Different Shaped Dimpled Protrusioned Pin Fin Wedge Duct for Turbine Blade using CFD

The tip of the turbine blade is exposed to gas at high temperatures and speeds. Cooling in this region has a significant impact on the safety of the turbine blade. Generally, internal convective cooling and external film cooling are simultaneously used for cooling in the blade tip region. For some turbine blades, only an internal cooling channel is used so that the cooling of the blade tip is completely dependent on internal convective cooling. In recent years, in the tip region of the turbine blade, multiple augmentation devices such as fins, ribs, pins, and dimples protrusions have gained a lot of attention to enhance heat transfer. Many computational simulations have been conducted in the meantime. The cooling performance of the blade inner tip area should be further investigated on the basis of analysis, especially when organised with a heat transfer enhancement structure. A very few studies have focused on the flow structure and heat transfer in a pin fin wedge duct with dimples protrusions. A wedge duct is explored by a numerical process in this present work, with the result of various dimples or protrusion shapes placed on the heated end wall surface. The model of a wedge duct on Workbench of ANSYS 17.0 Program, with different shapes of dimples or protrusions for turbine blade. It is observed that the Pin fin dimple wedge duct with trapezoidal dimples or protrusions form produces stronger heat transfer enhancement due to flow acceleration, increase in the region of impingement and shrinkage in the dimple of the flow recirculation field.

by Braznev | Prof. Animesh Singhai "Heat Transfer Characteristics of a Different Shaped Dimpled/Protrusioned Pin Fin Wedge Duct for Turbine Blade using CFD"

Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-5 | Issue-1 , December 2020,

URL: https://www.ijtsrd.com/papers/ijtsrd35856.pdf

Paper URL : https://www.ijtsrd.com/engineering/mechanical-engineering/35856/heat-transfer-characteristics-of-a-different-shaped-dimpledprotrusioned-pin-fin-wedge-duct-for-turbine-blade-using-cfd/braznev

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Analysis and Design of Pre Cast Box for Road under Bridge RUB and Road Over Bridge ROB by using STAAD Pro. and Box Pushing Technique

A level intersection or a level intersection is where a railroad line and a road meet each other at a comparative level. In the Urban locales generally the level crossing points are checked by qualified railroad staffs that screen the train advancement and close the level convergence entryway to stop the intruding road traffic yet such closing of portals prompts gridlock in roads, makes loss of time the road customers and from time to time similarly prompts a disaster. The most ideal decisions to murder the level going across are Road under Bridge RUB and Road over Bridge ROB . There are 3 essential systems for advancement of road under framework. Box pushing system, Cut and spread procedure, moving strategy using RH support. In this paper an arrangement of Road under Bridge or Subway by Box Pushing Method is presented. During that time, traffic is proceeding with overhead ordinarily, uninformed of the improvement underneath. The no risky nature of the cycle alongside its unavoidable prosperity, ease and economy make box pushing an important mechanical assembly for the practicing auxiliary fashioner. This paper intends to convey a more essential involvement in the carton pushing cycle to the peruser and subsequently give a couple of considerations and rules to help engineers in arranging an endeavor that can be collected using the holder pushing methodology. Box pushing is a settled strategies for planning conduits or entries under rail banks or streams to oblige road or rail traffic.

by Shubham Rghuvanshi | Prof. Nitesh Kushwah | Rajat Palya "Analysis and Design of Pre Cast Box for Road under Bridge (RUB) and Road Over Bridge (ROB) by using STAAD Pro. and Box Pushing Technique"

Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-5 | Issue-1 , December 2020,

URL: https://www.ijtsrd.com/papers/ijtsrd35884.pdf

Paper URL : https://www.ijtsrd.com/engineering/civil-engineering/35884/analysis-and-design-of-pre-cast-box-for-road-under-bridge-rub-and-road-over-bridge-rob-by-using-staad-pro-and-box-pushing-technique/shubham-rghuvanshi

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Development of an Equation to Estimate the Monthly Rainfall A Case Study for Catarman, Northern Samar, Philippines

This study aimed to derived an equation to estimate the monthly rainfall for Catarman, Northern Samar.The observed monthly rainfall data for Catarman N. Samar, Catbalogan Samar, Legazpi City and Masbate were obtained from the Philippine Atmospheric Geographical Astronomical Services Administration PAGASA . The monthly rainfall records of the three 3 neighboring stations Catbalogan, Legazpi, Masbate were used to identify which of the existing rainfall prediction methods, namely, Normal Ratio Method, Distance Power Method and Multi Linear Regression Method is the basis in the development of a new equation. The accuracy by which the existing methods predict the observed monthly rainfall in Catarman was evaluated using T test for correlated samples and the Pearson’s Correlation Coefficient. Since none of the methods produced estimates nearest to the observed monthly rainfall in Catarman, an equation has been derived Celeste A.

by De Asis | Benjamin D. Varela "Development of an Equation to Estimate the Monthly Rainfall: A Case Study for Catarman, Northern Samar, Philippines"

Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-5 | Issue-1 , December 2020,

URL: https://www.ijtsrd.com/papers/ijtsrd35875.pdf

Paper URL : https://www.ijtsrd.com/engineering/civil-engineering/35875/development-of-an-equation-to-estimate-the-monthly-rainfall-a-case-study-for-catarman-northern-samar-philippines/celeste-a-de-asis

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Cascaded Multiport Converter for SRM Based Hybrid Electrical Vehicle

This article about a cascaded multiport switched reluctance motor SRM drive for hybrid electric vehicle HEV , which gives two performances first thing flexible energy conversion among the generator ac grid, the battery bank, solar panel and the motor, second achieves battery management BM function for state of charge SOC balance control and bus voltage regulation. SRM accelerate the excitation and demagnetization processes during the commutation region, extend the speed range, reduce the voltage stress on the switches, and improve the torque capability and system efficiency by integrating the battery packs into the AHB converter, the cascaded BM modules are designed to configure multilevel bus voltage and current capacity for SRM drive. It includes different operation requirements like the multiple driving modes, regenerative braking modes, and charging modes. The feasibility and effectiveness of the proposed cascaded multiport SRM drive are verified by the simulation experiment on a three phase SRM.

by Prof. Ch. Mallareddy | Mr. Satish Subhash Chavan "Cascaded Multiport Converter for SRM-Based Hybrid Electrical Vehicle"

Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-5 | Issue-1 , December 2020,

URL: https://www.ijtsrd.com/papers/ijtsrd35873.pdf

Paper URL : https://www.ijtsrd.com/engineering/electrical-engineering/35873/cascaded-multiport-converter-for-srmbased-hybrid-electrical-vehicle/prof-ch-mallareddy

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Control and Monitoring of Hydro Power Plants A Review

In hydro power plants there is a main interest for the implementation of digital systems for control and monitoring replacing the conventional control systems for power, speed and voltage. As a result it is indispensable to build up mathematical models accomplished to accurately describe both dynamic and stationary behavior of the hydro plants, in order to be able to execute digital control algorithms. A significant development in stability of the system has been observed. This paper presents the comparison of simulation and modeling of the hydro power plants and performs of different control structures and algorithms.

by Atief Sharief | Harjit Singh | Onkar Singh "Control and Monitoring of Hydro Power Plants: A Review"

Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-5 | Issue-1 , December 2020,

URL: https://www.ijtsrd.com/papers/ijtsrd35825.pdf

Paper URL : https://www.ijtsrd.com/engineering/electrical-engineering/35825/control-and-monitoring-of-hydro-power-plants-a-review/atief-sharief

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Calculation for Design Peak Time of Commercial Building using Theoretical Analysis in Tropical Climate Country

This paper provides the calculating of peak time on various possible hours during operating time. According to the surveys and measurement, the peak time will occur at March due to the facing of glass and April due to the wall and roof . In addition, the value of solar heat gain factor SHGF in March for this building is greater than the April on the direction of East, South and West and the SHGF for April is greater than the March on North based on the latitude of Yangon 16.7875N . According to the theoretical analysis, the peak load occurs at 16hour 4PM in March with the amount of 40.459 KW for 4th floor of building envelope.

by Aung Ko Ko Lwin | Dr. Soe Soe Nu "Calculation for Design Peak Time of Commercial Building using Theoretical Analysis in Tropical Climate Country"

Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-5 | Issue-1 , December 2020,

URL: https://www.ijtsrd.com/papers/ijtsrd35826.pdf

Paper URL : https://www.ijtsrd.com/engineering/mechanical-engineering/35826/calculation-for-design-peak-time-of-commercial-building-using-theoretical-analysis-in-tropical-climate-country/aung-ko-ko-lwin

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Research on Ship Detection in Visible Remote Sensing Images

With the continuous development of remote sensing technology and satellite communication technology, the higher is the resolution of remote sensing images, and the richer is information contained in the image. How to obtain information from remote sensing images quickly and accurately is the key problem in the application of remote sensing technology. This paper introduces the automatic detection of ship targets in visible light remote sensing images, analyzes the methods and problems of target detection and semantic segmentation based on deep learning, which improves the accuracy of ship detection. Finally, this paper summarizes the short comings of the existing methods and prospects of the future research trend.