Zdeněk Veselý

• Ph.D.
• Researcher at University of West Bohemia

Thermal barrier coatings (TBCs) are widely utilized in gas turbine engines for power generation. In recent years, the application of TBCs in automotive has been introduced to improve engine efficiency. Low thermal conductivity and high durability are desired coating properties for both gas turbine engines and automotive. Also, suspension plasma spr...

Internal combustion engines have a key role in the social and economic advancement of modern society but also a significant contribution to greenhouse gas emissions. For these engines, to preserve their role, a higher efficiency, that dramatically reduces the environmental impact, is necessary. To achieve increased engine efficiency, a technical so...

For precise non-contact measurement of surface temperature using an infrared camera or pyrometer, it is very important to ensure a high and known emissivity value. A low or possibly unknown emissivity value makes it difficult or nearly impossible to evaluate the surface temperature using non-contact measurement. Thermographic paint is one of the po...

Infrared camera comparative measurement methods of thermally optical properties of materials are based on the measurement of infrared radiation emitted from the surface of the material that is heated to a higher temperature. These methods compare the response of the analyzed material with the set of reference materials called standards. Standards a...

Švantner, M., Študent, J., Veselý, Z., Zonal model for an effective simulation of heat transfer processes in walking beam steel reheating furnaces (2019) METAL 2019 - 28th International Conference on Metallurgy and Materials, Conference Proceedings, pp. 107-110. https://www.scopus.com/inward/record.uri?eid=2-s2.0-85079391613&partnerID=40&md5=ac042...

Coatings deposited on a material surface are effective way of changing its surface properties. For increasing or decreasing radiation heat transfer, coatings with high or low emissivity are used. Measurement of spectral emissivity is a fundamental step to effective use of coatings for this application. Up to now the measurement methods are focused...

Infrared non-destructive testing method (IRNDT) is suitable supplement to classic non-destructive testing methods (NDT). The advantage of IRNDT method is fast and non-contact measurement and evaluation that is available to various industrial and research applications. The method is suitable for both production process inspection (material inhomo...

A three-dimensional model of direct heat treatment of a sample surface with a moving laser has been established utilizing the finite element method. Attention is devoted to the preparation of complex boundary conditions of a moving heat source. Boundary conditions of material heat treatment are defined in the form of the heat transfer coefficient w...

Veselý Z., Švantner M.,Application of IRNDT method for materials in wide range of thermal diffusivity, Proc. of 13th Quantitative Infrared Thermography conference, QIRT 2016, July 4-8 2016, Gdansk, Poland, pp.267-268, 2016 Infrared non-destructive testing method (IRNDT) is suitable supplement to classic non-destructive testing methods (NDT). The...

The development of an experimental mathematical model describing temperature state of the sample during high temperature spectral emissivity measurement is introduced. Dimensional analysis of the measurement process gives the physical dimensionless quantities and sensitivity analysis of the measurement process provides the large set of performed mo...

http://dx.doi.org/10.1016/j.infrared.2015.12.001 Radiation heat transfer is one of the most important heat transfer modes in high-temperature applications. It is a strongly non-linear process, which depends on the temperature and emissivity of heat exchange surfaces, their geometrical configuration and properties of the surrounding atmosphere. Hea...

The aim of the performed work is to establish the 2D and 3D model of direct unsteady task of sample heat treatment by moving source employing computer model on the basis of finite element method. Complex boundary condition on heat loaded sample surface is the essential feature of the task. Computer model describes heat treatment of the sample durin...

Infrared nondestructive testing (IRNDT) is an advanced experimental method for defects inspection, which is based on active thermography. IRNDT uses an external excitation of a tested material and a thermographic analysis for an analysis of its response. It allows to obtain information about the tested material surface and sub-surface defects or st...

Infrared nondestructive testing (IRNDT) is an advanced experimental method for defects inspection, which is based on active thermography. IRNDT uses an external excitation of a tested material and a thermographic analysis for an analysis of its response. It allows to obtain information about the tested material surface and sub-surface defects or st...

Computer model of temperature distribution in the sample in high temperature spectral emissivity measurement method is introduced. Sensitivity analysis is performed using computer model to determine the effect of various measurement method parameters on the sample temperatures. The effects of measured and reference coating thicknesses, measured coa...

Active thermography is an advanced experimental procedure, which uses a thermography measurement of a tested material thermal response after its external excitation. This principle can be used also for non-contact infra-red non-destructive testing (IRNDT) of materials. The IRNDT method is based on an excitation of a tested material by an external s...

The contribution deals with the methodology of determination of the effect of coatings deposited on the inner surface of the electric furnace on the charge heating. The demonstrative results of measuring using the laboratory furnace with replaceable inner wall inserts are involved. These wall inserts are prepared from the two types of thermal insul...

High power laser - total emissivity method (HPL-TE method) for determination of coatings relative total emissivity dependent on the temperature is introduced. Method principle, experimental and evaluation parts of the method are described. Computer model of HPL-TE method is employed to perform the sensitivity analysis of the effect of method parame...

This paper deals with the application of the stochastic Exodus method in simulation of the heat transfer processes in the multi-layer structure of thermal barrier coating. A 2D computer simulation model of thermal barrier behaviour during its dynamic thermal loading is presented. The Exodus stochastic simulation method has been applied to solve the...

A computer simulation model of billet heating process in continuous pusher-type furnace is presented. The Exodus stochastic simulation method is used to solve the heat conduction partial differential equation. This paper deals with the application of the Exodus method in the furnace optimal heating-control system. A comparison of the computed resul...

The paper deals with the measurement in continuous industrial furnaces. Measuring technique and measuring device are presented. Temperature evolutions are measured on the experimental billet and records of the furnace heating-control system are shown. Furnace distributions of temperature, heat flux, and heat transfer coefficient are determined by m...

Résumé: This book is theoretically and experimentally focused on thermal barriers. It consists of three independent parts dealing with thermal barrier coatings (TBC), thermal box-barriers (TBB) and natural thermal barriers (TBN). The thermal barrier coatings serve mainly to material protection against high temperatures. Thermal box-barriers introdu...

Thermal barriers (TB) protect material against high temperatures and thermal shocks. The effect of various TB - substrate structures to their dynamic behaviour under the thermal shock is studied. The TB parameters such as number of individual layers, their thicknesses and porosities and thermal and mechanical properties of their materials have been...

The contribution presents the development on the optimal heating control system for con-tinuous furnaces. Concept and basic description of the optimization system are introduced. Partial focus is devoted to the CFD computations of thermo-mechanical processes in the in-ternal furnace space and to the ways of measurement in continuous furnaces.

The aim of the contribution is to present the current computational capabilities and results of thermomechanical processes simulation in the industrial furnace. Three-dimensional model of the continuous pusher-type furnace employed in mild rolling mill has been created. The resultant velocity and temperature distributions inside the furnace, heat f...

We develop a mathematical and simulation model to simulate thermomechanical processes during thermal shock on the surface of different thermal barrier structures. The finite element method is applied to the heterogeneous thin layer structure of thermal barrier. Temperature, temperature gradient, heat flux, thermally induced stress and strain are ch...