The temperature - and stress fields of valves of IC engine

• Autorzy: Jaskólski J. , Krzyżak R.
• Języki publikacji: EN

Abstrakty

EN

The paper concerns building up one exhaust valve of composite-steel and two intake ceramics-steel valves of a hypothetical adiabatic engine. The input temperatures were computed using three diverse FORTRAN95 programs, solving a shortened optical integral equation with radiative transfer, transient differential equation while starting and switching off the engine and a rod like diff. Equation with 'progonka' (Thomas) solution. The ANSYS11 programme was fed up with the output of the programs. It turns out that, generally, a mineralogical, crystal-chemical approach to the joining of materials results in stresses known from the common metal engines. Such problems as CTE enhancing (partly hypothetical) by means of doping the anionic compounds by cationic ones, swelling of structures, compressibility versus coefficient of thermal expansion (CTE) , compatibility of crystal motifs while joining, thermal shock resistance, switching the bonds, mechanical longevity, radiation protection etc were addressed. It turns out that true nature of the temperature and stress field, especially of the exhaust valve is closer to the FORTRAN temperature computation than, e.g. From the heat film coefficients (ANSYS11).

Słowa kluczowe

EN

intake valve; output valve; YSZ; ferberite; scheelite; silicides; pyroxene; composite; joining of materials; thermal conductivity; radiative transfer; thermal expansion

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2007
• Tom: Vol. 14, No. 3
• Strony: 245--252
• Opis fizyczny: Bibliogr. 6 poz., rys.

Twórcy

autor

Jaskólski J.

autor

Krzyżak R.

• Cracow University of Technology Institute of Vehicles and IC Engines Jana Pawła II37, 31-864 Cracow, Poland tel.: [phone],

Bibliografia

• [1] Grassely, Gy., An attempt to characterisethe stability relation of tetrahedral oxyanions by their complex anionic potentials, NJM Abh., p.1075, 1960.
• [2] Kwaśniowski, K., Sroka, Z. J., Zabłocki, W., Modelowanie obciążeń� cieplnych w elementach silników spalinowych, Oficyna PW, 133 pp Wrocław, 1999.
• [3] Ramberg, H., Artifical and natural photoelastic effects in quartz and feldspars, p. 934-951, AM, 1961.
• [4] Stepanenko, A. V., et al., Analiz urovnya ostatochnykh napryazheniy i mikrodeformaciy v kompzite almaz-karbid kremniya, Part I and II., Ogneup., 2005/7, p. 8-11 and 2005/8, p. 10-16, 2005.
• [5] Stepanov, V. A., et al., Prochnost’ i relaksatsyonnye yavleniya v tverdykh telach, Nauka, Leningrad, 245 pp. 1984.
• [6] Tret’yachenko, G. N., Karpinos, B. S., Zavisimost’ mezhdu mekhanichesimi i teplofizicheskimi kharakteristikami materialov pri nagruzhenii tverdykh tel, Probl. Prochn., 1986/ 10, pp. 9-14, 1986.