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Information × Registration Number 0214U000974, 0112U000936 , R & D reports Title Heat transfer and aerodynamic drag of complicate profiled heat surfaces popup.stage_title Head Tuz V. E., Registration Date 02-12-2014 Organization Faculty of аircraft and space systems NTUU "KPI" popup.description2 Object of study: Heat and momentum processes in the heat transfer surfaces of complicated profiled tubes when forced to be flown by transversal gas stream. Subject of study: Regularities of heat transfer and aerodynamic drag of heat transfer surfaces of complicated profiled tubes in a wide range of their design and operational characteristics modification. Purpose of study: Experimental research of heat and aerodynamic characteristics and development of heat transfer and aerodynamic calculations methods of heat transfer surfaces of complicated profiled tubes in cross flow; getting a picture of the flow on the outer surface of tubes in a wide range of variation of geometrical and operational parameters. Methods of research: When studying the heat transfer and aerodynamic drag of tubes packages was used the methods of experimental research in open-loop wind tunnel. The intensity of convective heat transfer is determined on basis of the temperature field measurements of the tube wall. The investigation of aerodynamic drag is performed by determining the difference of static pressures at the inlet and outlet of the working area. To study the characteristics of the flow was used the method of surface flow visualization by means of soot and oil compound. For the first time was researched the patterns of external heat transfer and aerodynamic drag of staggered bundles of flat-oval complicated profiled tubes; was discovered the impact of principal geometric and operational parameters on the intensity of heat transfer and aerodynamic drag. Was obtained new generalized dependences for calculation the convective heat transfer and drag, considering the modification of geometric characteristics of tubes and bundles in such range of modification: the extension of profile from 2 to 5 and the tubes placement parameter in the bundles from 0.4 to 1.45. The surfaces of such tubes are 1.5-2 times more heat and aerodynamic efficient compared to bundles of round profiled tubes. Product Description popup.authors Баранюк О.В. Кондратюк В. А. Письменний Є. М. Рева С. А. Рогачов В.А. Семеняко О. В. Терех О.М. popup.nrat_date 2020-04-02 Close