ISSN 2343–7707 ; ISSN-L 1453-7303

HIDRAULICA Magazine No. 2 / 2024

Hidraulica no. 2/2024

Modeling and Simulation of the Hydraulic Clamping/Unclamping Systems Using Hydro-Pneumatic Accumulators

This article highlights some methods for determining the optimal accumulator for the hydraulic units with accumulators used in the locking and clamping/unclamping systems for machine-tools. The mathematical models and the results of the simulations carried out for designing such units are shown below. The results of the research can also be applied in the case of … (read more)

The Laser Treatment’s Impact on the Surface Topography of MONEL® Alloy 400, used in the Manufacturing of Marine Equipment Components
Authors: Ștefan ŢĂLU, Kipkurui RONOH, Dinara SOBOLA

In the study, the authors investigated the effects of picosecond laser ablation on the surface topographies of MONEL® alloy 400, used in the manufacturing of marine equipment components (such as pumps, valves, fixtures and fasteners). The experimental methodology involved preparing the material through grinding, polishing, and cleaning before subjecting it to picosecond laser ablation using specific parameters. The laser processing was carried out to create square ablated cavities on the alloy surface. The impact of the laser treatment on the surface condition of the alloy was assessed through … (read more)

Experimental Measurement of Functional Parameters for a Tesla Turbine
Authors: Răzvan-Ionuț TĂNĂSESCU, Dragoș-Ionuț SBURLAN, Adrian-Sebastian UNGUREANU, Ștefan-Mugur SIMIONESCU

A small-scale experimental set-up was designed and built, consisting of a Tesla turbine and electric generator, with casing, consumer and measurement devices. Experimental measurements were carried out, regarding the working performance of the turbine at different air inlet pressures. The other parameters measured were the inlet air velocity, the rotational speed and the output electrical power. The results were discussed and explained through … (read more)

Density and Viscosity Effects of Hydraulic System Working Fluid 
Author: Fănel ȘCHEAUA

Fluid actuation systems have proven their efficiency over time to ensure the solution of the most difficult tasks in most industries. Today we are witnessing the implementation of these systems on most of the machines and equipment that make up the stationary and mobile industry. This development is highlighted by the well-designed construction of the components, which have been modernized over time, thus enabling actuation solutions for … (read more)

New Drought Index Implementation at Station 15130, Valle de Bravo, Mexico
Authors: Maritza ARGANIS, Margarita PRECIADO, Faustino DE LUNA

This research focused on meteorological drought problem a phenomenon that has affected several countries and has had significant impacts on various water uses, including human, agricultural, and industrial consumption. To address this problem, the NDI index was applied, which uses precipitation and mean air temperature data, and the RASP method to the annual data of the Presa Valle de Bravo weather station, in Edomex., Mexico. This analysis allowed the identification of (read more)

High-Performance Techniques and Technologies for Monitoring and Controlling Environmental Factors
Authors: Marius-Valentin DUMITRESCU, Ionuț VOICU, Aurelia-Florentina VASILICA, Mariana PANAITESCU, Fănel-Viorel PANAITESCU

The impact of air quality inside residential buildings and constructions on the health of residents and workers has been studied very little in recent years. In the school environment, students are constantly exposed to mixtures of airborne substances from a wide variety of sources both in classrooms and in the school environment. Exposure to such factors of students influences, in the long term, physiological development, dynamics, quality of life, life expectancy, without being aware of the dangers in the air and being able to make decisions on reducing exposure to the risk factor. In the short term, poor air quality in classrooms leads to a decrease in attention and concentration, both for the student and the teaching staff. The research is motivated by  (read more)

Insights on Hydroponic Systems: Understanding Consumer Attitudes in the Cultivation of Hydroponically Grown Fruits and Vegetables
Author: Ștefan ŢĂLU

This study examines consumer attitudes toward fruits and vegetable cultivation in hydroponic systems, shedding light on how consumers perceive and interact with this innovative agricultural approach. Socio-demographic factors, such as gender, age, and education level, emerged as significant influencers on the frequency of consuming fruits and vegetables grown hydroponically. The frequency of consuming hydroponically grown fruits and vegetables is notably shaped by consumers’ knowledge regarding the quality and safety of produce from this farming method. Furthermore, this analysis reveals (read more)

Hydraulic Power Generation Unit Powered by Photovoltaic Energy
Authors: Radu RĂDOI, Bogdan TUDOR, Ștefan ȘEFU, Robert BLEJAN

The conversion of solar energy into electricity can provide a solution to the following problems: access to electricity for users or applications in areas without access to the electricity grid and hybrid system operation of some equipment in order to reduce pollution due to conventional energy sources (internal combustion engines, mainly). In both cases, if hydraulic power is required at the end user (irrigation systems, waste compaction, lifting installations, various drive systems), this is obtained with the help of … (read more)

Assessing Flood Severity and Risk to Residents in Bosque Chapultepec
Authors: Itai NAVA-ROMERO, José Avidán BRAVO-JÁCOME, Margarita Elizabeth PRECIADO-JIMÉNEZ

This paper aims to study storm events that lead to urban flooding and their after-effects in Bosque Chapultepec, an urban forest located in Mexico City. Considering Bosque Chapultepec’s landscape configuration and composition, along with micro-watersheds that drain into the four-sectioned study area, the water depths and velocities were estimated through hydrodynamic models in Iber derived from … (read more)

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