The temperature and stress field of the ceramic-capped cylinder head of the hypothetical adiabatic diesel engine

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

Abstrakty

EN

Four of five models of the ceramic-slab-capped cast-iron cylinder head for a prospective adiabatic engine were numerically investigated. The models were designed using several crystallochemical-mineralogical considerations. The outcome of some short radiation and convection Fortran95 programmes became the input data for the FEM programme of temperatures and stresses. It turns out, that in general the material that cannot withstand will hardly be ceramics, but the cast iron. Thence, the latter should be replaced, plated or the ceramics should cover it at the injection jet. The temperatures and stresses were analysed with and without an interlayer. Two models, with feldspars and Ti6Al4V or Pt30Au70, were quite promising, the first one being surely at once applicable even without interlayer i.e. according to FEM. The stresses in the models with YSZ, cerium disilicide and/or pyroxene, in spite of the crystallochemical hattrics deemed successful, betoken spallation of the YSZ. The problems of emissivity were addressed as well. There exists a blank range of temperature where neither radiation-related algorithm nor the common conductivity one can perform well. The surface of the head under hood appears 'quite cold', except the exhaust pipe, the TBC solution of which is left in abeyance in this paper. Adiabatic engines using ceramic as the material for the combustion camber walls were developed for the reduction of cooling loss and the in crease of exhaust energies.

Słowa kluczowe

EN

cylinder head; PtAu alloy; thermal conductivity; thermal stress

• 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: 2008
• Tom: Vol. 15, No. 4
• Strony: 635--640
• Opis fizyczny: Bibliogr. 5 poz., rys.

Twórcy

autor

Jaskólski J.

autor

Krzyżak R.

• Cracow University of Technology, Institute of Vehicles and IC Engines Jana Pawła the IIAvenue 37, PL 31-864 Cracow, Poland tel.: [phone],

Bibliografia

• [1] Grasselly, G., An attempt to characterize the stability relations of tetrahedral oxidations by their complex anionic potentials, N. Jb. Miner., Abh. (Festband Ramdohr), p.1075-1092, 1960.
• [2] Kwaśniowski, S., Sroka, Z. J., Zabocki, W., Modelowanie obciążeń cieplnych w elementach silników spalinowych, Oficyna Wydawnicza Polit. Wrocławskiej, Wrocław, 1999.
• [3] Ramberg, H., Artificial and natural photoelastic effects in quartz and feldspars, Amer. Miner., p. 934-951, 1961.
• [4] Samsonov, G. V., Dvorina, L. A., Rud, B. M., Silicidy, Metallurgia, Moskva, 1979.
• [5] Woods, M. E., Mandler, Jr. W. F., Scofield, T. L., Designing ceramic insulated components for the adiabatic engine, Ceramic Bull., p.287-289 and 292-293, 1985.