FEATURES OF THE APPLICATION OF THE IQLAB PROGRAM FOR SOLVING THE INVERSE HEAT CONDUCTION PROBLEM FOR CHROMIUM-NICKEL CYLINDRICAL THERMOSONDES


  • E.N. Zotov Institute of Engineering Thermophysics, National Academy of Sciences of Ukraine, ul. Zhelyabova, 2a, Kiev, 03680, Ukraine
  • A.A. Moskalenko Institute of Engineering Thermophysics, National Academy of Sciences of Ukraine, ul. Zhelyabova, 2a, Kiev, 03680, Ukraine
  • O.V. Razumtseva Institute of Engineering Thermophysics, National Academy of Sciences of Ukraine, ul. Zhelyabova, 2a, Kiev, 03680, Ukraine
  • L.N. Protsenko Institute of Engineering Thermophysics, National Academy of Sciences of Ukraine, ul. Zhelyabova, 2a, Kiev, 03680, Ukraine
  • V.V. Dobryvechir LTD "Intensive technologies", 68/1, Pobeda ave., Kiev, 03113, Ukreine
Keywords: determination of the cooling capacity of a liquid, a thermal probe, direct and inverse heat conduction problems, the IQLab program

Abstract

The paper presents an experimental-computational study of the results of using the IQLab program to solve inverse heat conduction problem and restore the surface temperature of cylindrical thermosondes from heat-resistant chromium-nickel alloys while cooling them in liquid media.

The purpose of this paper is to verify the correct operation of the IQLab program when restoring the surface temperature of thermosondes with 1-3 thermocouples. The IQLab program is also designed to solve one-dimensional nonlinear direct lines and inverse heat conduction problems with constant initial and boundary conditions specified as a function of time in a tabular form with a constant and variable time step. A finite-difference method is used to solve the heat equation.

Experiments were carried out on samples D = 10-50 mm in liquids with different cooling capacities such as aqueous solutions of  NaCl and Yukon-E polymer, rapeseed oil and I-20A mineral oil. For the calculation we used the readings of thermocouples installed at internal points of cylindrical thermosondes.

The advantages of solving inverse heat conduction problems with the IQLab program include the possibility of restoring the surface temperature for cylindrical samples with a diameter of 10 mm to 50 mm with practical accuracy according to the indications of a single thermocouple located in the geometrical center of the thermosonde, which simplifies the manufacture of the probe. For larger dimensions with a diameter D ≥ 50 mm, it is necessary to install control intermediate thermocouples and perform additional tests.

The solution of inverse heat conduction problems and restoration of the surface temperature of the sample makes it possible to calculate other important characteristics of the cooling process: the heat flux density and the heat transfer coefficient.

References

1. ISO 9950: 1995: Industrial Quenching Oils Determination of Cooling Characteristics-Nickel-Alloy Probe Test Method, International Standard, International Organization for Standardization, Geneva, Switzerland, – 1995.
2. ISO 9950, "Industrial Quenching Oils-Determination of Cooling Characteristics-Nickel-Alloy Probe Test Method, 1995 (E)," International Organization for Standardization, Geneva, Switzerland, 1995.
3. ASTM D6200-01, Standard Test Method for Determination of Cooling Characteristics of Quench Oils by Cooling Curve Analysis, ASTM International, West Conshohocken, PA, 2012, www.astm.org.
4. Kobasko, N., and Liscic, B., LISCIC / PETROFER probe to investigate real industrial hardening processes and some fundamentals during quenching of steel parts in liquid media., EUREKA: Physics and Engineering , 2017, No. 6.
5. Zotov E.N., Moskalenko A.A., Razumtseva O.V., Protsenko L.N. Determination of the coefficient of heat transfer during cooling of silver thermosondes taking into account the effects of temperature-time delay. Journal of Industrial Heat Engineering (Promyshlennaya Teplotekhnika), 2017, Vol. 39, No. 5, p. 34–40, (Rus).
6. Dobrivecher V.V., Zotov E.N., Kobasko N.I., Morgunyuk V.S., Sergeev Yu.V. The software complex "IQLab", commercially distributed by "Intensive technologies LTD" (iqlab@itl/kiev.ua), (Rus).
7. Zotov E.N., Moskalenko A.A., Dobrivecher V.V., Kobasko N.I., Deineko L.N. Using the IQLab program to select the optimal modes for the heat treatment of steel products. Collection of reports of the 6th International Conference "Equipment and Technologies for Heat Treatment of Metals and Alloys", (OTTOM-6), Part II, Kharkov, NSC KIPT, CPC "Contrast", 2005, p.106–115, (Rus).
8. Krukovsky P.G. Inverse problems of heat and mass transfer (General engineering approach). Kiev: Institute of Engineering Thermophysics, 1998, 224 p, (Rus).

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Published
2018-09-07
How to Cite
Zotov, E., Moskalenko, A., Razumtseva, O., Protsenko, L., & Dobryvechir, V. (2018). FEATURES OF THE APPLICATION OF THE IQLAB PROGRAM FOR SOLVING THE INVERSE HEAT CONDUCTION PROBLEM FOR CHROMIUM-NICKEL CYLINDRICAL THERMOSONDES. Thermophysics and Thermal Power Engineering, 40(3), 91-96. https://doi.org/https://doi.org/10.31472/ihe.3.2018.12
Section
Thermodynamics and Transport Phenomena, Nuclear Power Engineering