temperature

This paper presents the findings from numerical modeling of the turning process of titanium alloys with preheating of the workpiece. This modelling was conducted using the DEFORM-2D software environment, which is based on the finite element method (FEM). The objective of this study is to investigate the influence of workpiece temperature on cutting force and to determine the optimal heating parameters for machining materials that are challenging to process.

Problem statement and the research purpose. Problem statement and purpose of the work: This paper presents a method for predicting the temperature of carbide tools used for cutting gear wheels with the Power Skiving method. This task is particularly relevant for automated equipment, including gear-cutting machines.

The article presents the study results of air distribution in a room with a flat air jet. In particular, dynamic pressure, density and viscosity of air flow were considered. Aim of a paper is to numerically simulate these physical properties of a flat air jet in a room. A graphical representation of air jet parameters was obtained using package CFD Ansys FLUENT software. A hypothesis of applying Mendeleev-Clapeyron equation to moving air flow was considered. Flat air jets have been found to be effective in terms of velocity attenuation in indoor air distribution.

This study presents a methodology for assessing the technical condition of district heating pipelines under high wear, variable thermal loads, and limited modernization resources. Emphasis is placed on installation defects, cyclic temperature and pressure fluctuations, and corrosion-induced degradation. A case study of a return water pipeline in Kremenchuk, featuring a 3° installation misalignment and 10 cm flange displacement, demonstrated stresses of 220–250 MPa, exceeding the steel’s yield strength in critical zones.

This paper is dedicated to the development of a unified system for monitoring microclimate parameters in the terrariums of the Kyiv Zoo. In cooperation with zoo representatives, existing methods and devices for artificially creating a microclimate in exhibition modules were reviewed and analyzed. The issues of this process were examined, and the main parameters for animal housing conditions were determined, such as air or water temperature, humidity, illumination, and the level of ultraviolet radiation. Six exhibition modules were selected for experimental studies.

Contact methods are usually used to measure the temperature of industrial technological objects. When using the contact method to create the necessary conditions for heat exchange, thermal transducer must be in direct contact with the object of study, the temperature of which must be measured. When measuring stationary temperatures, the readings must be taken after a certain time interval from the moment of contact of the thermal transducer with the object of study, when a state of thermal equilibrium is established between them.

The present paper examines the impact of preheating a titanium alloy on cutting force and surface quality during turning. The primary objective of the present study is to ascertain how variations in workpiece temperature prior to machining affect the technological parameters of the cutting process, specifically cutting force and the surface roughness parameter Ra. The experimental portion of the study involved the turning of a Ti-6Al-4V titanium alloy workpiece at numerous preheating temperatures, including room temperature, 300°C, 400°C, 500°C, and 600°C.

The article is devoted to the study of the features of continuous monitoring of changes in the color of information channels of passive pressure-temperature sensors, tracking the spectral distribution of the light intensity of the liquid crystal color depending on the operating conditions. The main direction of application of such sensors can be “screening” of chemically active environments, deployment of temporary objects of short-term use in conditions of a pandemic, or military operations, etc.

Problem statement and the research purpose. One of the main factors determining the intensity of tool wear is the temperature that arises during the cutting process. Thus, the objective is to investigate the patterns and obtain dependencies of heat generation and heat transfer between the elements of the cutting process that characterize the temperature of the tool’s teeth and blades.