<abstract xmlns="http://www.w3.org/1999/xhtml">

The aim of the paper is to present through a contrastive analysis the main models used in the analysis and design of horizontal axis wind turbines. The basis for designing a rotor for a wind turbine, which is the main element of a turbine that extracts energy from the wind, is the propeller theory. This theory incorporates mathematical models that describe the movement of fluid around the propeller. The paper presents three generically named models, model A, model B and model C respectively, used in the analysis and design of the horizontal axis wind turbine’s rotor.
</abstract>

Studies on the Design Models of Horizontal Axis Wind Turbines

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In this paper, it is in focus an analysis and a theoretical study which will develop a mathematical model that will highlight the influences of the thermal regime of a spark plug engine regarding the engine performance improvement.
</abstract>

Theoretical Research to Improve the Performance of a Spark Ignition Engine by Using Zonal Cooling Principle

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In this paper, it is in focus a detailed analysis of the temperature distribution in the cylinder head. For this scope is build up a tree-dimensional (3D) model using Catia V5. The thermal analysis was performed using 3D finite element method, Ansys Workbench 16.1.
</abstract>

Cylinder Head Analysis from Thermal Point of View Using Finite Element Method (FEM) of a Spark Ignition Engine by Using Zonal Cooling Principle

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This paper presents the Taguchi method implemented for analyzing different types of wind blade structure.
</abstract>

Taguchi’s Method Implemented for Wind Blade Design

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This paper deals with hydraulic cylinders with and without end position cushioning. The reduction of the velocity at the end of the stroke is important in order to preserve the structural integrity and to avoid undesirable motion of the load. The mathematical model of such a hydraulic cylinder is shown, as well as the Matlab functional diagram for the system. It is also revealed the role of the working fluid, considering the actual recommendations regarding the biodegradable substances. It was considered both mineral base liquids and vegetable base liquids. The functional diagram offers the possibility to view for the hydraulic system the variation of the speed, flow rate, rate and stroke of the piston, in both cases: with and without end position cushioning. Is also shown a CFD analysis of fluid flow through the supply/outlet connections of the hydraulic cylinder.
</abstract>

Aspects Regarding the Dynamic Behavior of a Hydraulic Cylinder

<abstract xmlns="http://www.w3.org/1999/xhtml">

The overloading vehicle become an important problem for Europe Union, protecting the environment and increase the traffic safety. WIM or weigh-in-motion systems can monitor the traffic, determine the volume and type of traffic and detect the overload vehicles which are illegal. This paper discusses about applying the Failure Mode and Effect Analysis method for developing a new concept of WIM sensor, designed in PhD thesis from “Gheorghe Asachi” Technical University of Iaşi. FMEA method or also called potential failure modes and effects analysis is a step-by-step approach for determine and identifying all possible failures in a new design, or manufacture process. This new concept of sensor can be used for urban traffic in order to reduce the cars pollution in the cities by providing real-time data traffic, monitoring vehicles and detecting the overloaded trucks. The FMEA method was applied for identification of functional failure risks and preventing failures from an early stage of concept.
</abstract>

Functional Analysis of a New Concept of WIM Sensor by Using Failure Mode and Effects Analysis (F.M.E.A.)

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Traffic studies are important because these provide significant information about traffic flows and traffic mobility in the area of study. Also, these studies can help to fluidize the traffic considering the actual number of cars and of the future cars which is estimated to increase due to considering traffic signals, roundabout or other traffic solutions. Traffic impact studies are important because the governmental agencies require them when a new building is developed as this can generate the increase of car traffic or can change the existing traffic paths. In this paper it will see how a new real estate construction area with mixed functions in the Miroslava village influence the traffic flow. This new building will lead to an increased the number of vehicles in the area and will change the existing traffic patterns, so it is required a traffic study.
</abstract>

Influence of a Real Estate Construction Area with Mixed Functions - Traffic Study

AHEAD OF PRINT

Volume 69 (2023): Issue 4 (December 2023)

Volume 69 (2023): Issue 3 (September 2023)

Volume 69 (2023): Issue 2 (June 2023)

Volume 69 (2023): Issue 1 (March 2023)

Volume 68 (2022): Issue 4 (December 2022)

Volume 68 (2022): Issue 3 (September 2022)

Volume 68 (2022): Issue 2 (June 2022)

Volume 68 (2022): Issue 1 (March 2022)

Volume 67 (2021): Issue 4 (December 2021)

Volume 67 (2021): Issue 3 (September 2021)

Volume 67 (2021): Issue 2 (June 2021)

Volume 67 (2021): Issue 1 (March 2021)

Bulletin of the Polytechnic Institute of Iași. Machine constructions Section

 Machine Construction section, as part of the Bulletin of the Polytechnic Institute of Iasi founded in 1946, appears as an autonomous publication since 1950. Currently, it is issued in both printed and electronic format, on a quarterly basis, and is included in a library exchange program with 84 other publications. The Machine Construction section is a technical scientific journal which publishes original research papers, as well as occasional reviews of treaties, lectures and monographs in various fields of Mechanical Engineering. Main topics include: theoretical and applied machine mechanics; fluid mechanics and hydro-pneumatic machines; robotics; tribology; machine manufacturing; machining technologies; industrial management; economical engineering in mechanics; machine design; mechatronics; theoretical and experimental study of strain and stress; micromechanical systems; materials machinability and surface finishing technologies; machine tools; automotive; internal combustion engines; steam and gas turbo-engines; refrigeration machines and heat pumps; renewable energy sources; heat transfer; cogeneration and tri-generation systems; applied thermodynamics and thermal systems; combustion; agricultural mechanics and machinery; technologies and equipment for food processing and food industry; bioengineering and biofuels; traffic and safety etc. At this time, there is no publication fee and full-text papers are available open-access on the university website. The review process of each submitted paper includes an anti-plagiarism test with specialized software and a double-blind independent review. The authors are notified at each stage of the process. The rejection rate is above 50%. The main publication language is English.  Archiving  Sciendo archives the contents of this journal in Portico - digital long-term preservation service of scholarly books, journals and collections.  Plagiarism Policy  The editorial board is participating in a growing community of Similarity Check System's users in order to ensure that the content published is original and trustworthy. Similarity Check is a medium that allows for comprehensive manuscripts screening, aimed to eliminate plagiarism and provide a high standard and quality peer-review process. 