Prohlížení Ústřední knihovna ČVUT dle názvu

Zobrazují se záznamy 295-314 z 2019

    • CFD FLOW ANALYSIS OF THE CANTILEVER MICRO-TURBINE 

      Autor: Syka, Tomáš; Weiß, Andreas P.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2018)
      The article deals with a description of results from research and development of the cantilever micro-turbine designed for the ORC power plants. The experimental turbine stage and used numerical models are briefly described. ...

    • CFD modelling of a secondary settling tanks: generalization based on database relations 

      Autor: Švanda, Ondřej; Pollert, Jaroslav
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)
      The modelling of a secondary settling tank area using numerical methods has been quite extensively explored and researched by numerous authors and papers. These developed models utilize different approaches, from efforts ...

    • CFD SIMULATION OF A STIRRED DISHED BOTTOM VESSEL 

      Autor: Vlček , Petr; Skočilas , Jan; Jirout , Tomáš
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      This paper deals with simulation of the fluid flow in a stirred curved-bottom vessel equipped with three curved blade impellers. The power number and the impeller flow rate number are dimensionless characteristics of the ...

    • CFD simulation of partial channel blockage on plate-type fuel of TRIGA-2000 conversion reactor core 

      Autor: Dibyo, Sukmanto; Luthfi, Wahid; Pinem, Surian; Irianto, Ign Djoko; Sriwardhani, Veronica Indriati
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)
      A nuclear reactor cooling system that has been operating for a long time can carry some debris into a fuel coolant channel, which can result in a blockage. An in-depth two-dimensional simulation of partial channel blockage ...

    • CFD SIMULATION OF THE HEAT TRANSFER PROCESS IN A CHEVRON PLATE HEAT EXCHANGER USING THE SST TURBULENCE MODEL 

      Autor: Skočilas , Jan; Palaziuk , Ievgen
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)
      This paper deals with a computational fluid dynamics (CFD) simulation of the heat transfer process during turbulent hot water flow between two chevron plates in a plate heat exchanger. A three-dimensional model with the ...

    • CFD SIMULATION OF UPWARD SUBCOOLED BOILING FLOW OF FREON R12 

      Autor: Romsy, Tomas; Zacha, Pavel
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2016)
      Subcooled flow boiling under forced convection occurs in many industrial applications of purpose to maximize heat removal from the heat source by the very large heat transfer coefficient. This work deals with CFD simulations ...

    • CHANGE OF A HIGHWAY ROUTE CAUSED BY A ROCKSLIDE 

      Autor: Kopecký, Miloslav; Brček, Martin; Frankovská, Jana; Ondrášik, Martin; Fraštia, Marek; Liščák, Pavel; Novotný, Jan
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2021)
      During the spring of 2013, a relatively large rockslide with a total area of 96,952 m2 occurred in the eastern part of the Malá Fatra mountains. The anticipated depth of the slip surfaces was from 30 to 40 metres and the ...

    • Change of Pressing Chamber Conicalness at Briquetting Process in Briquetting Machine Pressing Chamber 

      Autor: Križan , Peter; Matúš , Miloš; Kers , Jaan; Vukelić , Djordje
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)
      In this paper, we will present the impact of the conical shape of a pressing chamber, an important structural parameter. Besides the known impact of the technological parameters of pressing chambers, it is also very important ...

    • CHANGES IN THE SURFACE LAYER OF ROLLED BEARING STEEL 

      Autor: Zemčík , Oskar; Sedlák , Josef; Chladil , Josef
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)
      This paper describes changes observed in bearing steel due to roller burnishing. Hydrostatic roller burnishing was selected as the most suitable method for performing roller burnishing on hardened bearing steel. The ...

    • CHAOTISED POLYMERIC HOLLOW FIBRE BUNDLE AS A CROSSFLOW HEAT EXCHANGER IN AIR-WATER APPLICATION 

      Autor: Kroulíková , Tereza; Astrouski , Ilya; Raudenský , Miroslav
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2020)
      Fifteen years ago, polymeric hollow fibre heat exchangers were presented for the first time. Nowadays there are not only the shell-and-tube types as there were at the beginning. In this paper, six chaotised polymeric hollow ...

    • Characteristics of business models for innovation clusters in decarbonation projects 

      Autor: Haase, Matthias; Motoasca, Emilia
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)
      Roughly 97 % of the European Union (EU)’s building stock is not considered energy efficient, and 75 to 85 % of it will still be in use in 2050. Residential buildings account for around two thirds of final energy consumption ...

    • CHARACTERIZATION OF CEMENT-BASED COMPOSITE EXPOSED TO HIGH TEMPERATURES VIA ULTRASONIC PULSE METHOD 

      Autor: Rozsypalová, Iva; Vyhlídal, Michal; Dvořák, Richard; Majda, Tomáš; Topolář, Libor; Pazdera, Luboš; Šimonová, Hana; Keršner, Zbyněk
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2018)
      In this paper, the attention is paid to the investigation of the influence of high temperature acting on specimens made from specially designed cement-based composite. The experimental programme was carried out on six sets ...

    • Characterization of Human Gait using Fuzzy Logic 

      Autor: Kutilek , Patrik; Viteckova , Slavka; Svoboda , Zdenek
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      In medical practice, there is no appropriate widely-used application of a system based on fuzzy logic for identifying the lower limb movement type or type of walking. The object of our study was to determine characteristics ...

    • CHARACTERIZATION OF LIGHTWEIGHT LIME MORTARS CONTAINING BRICK WASTE POWDER 

      Autor: Vyšvařil, Martin; Žižlavský, Tomáš; Bayer, Patrik; Rovnaníková, Pavla
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2019)
      This work deals with the effects of an expanded perlite (EP) on the hardened properties of air lime mortars with a 50% brick waste powder content. The influence of different substitution of quartz sand by EP is also monitored ...

    • CHARACTERIZATION OF RECYCLED LINEAR DENSITY POLYETHYLENE/IMPERATA CYLINDRICA PARTICULATE COMPOSITES 

      Autor: Olusunmade Femi, Olusola; Zechariah , Sunday; Yusuf Ayotunde, Taofeek
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2018)
      Water-sachets made from low density polyethylene (LDPE) form a bulk of plastic wastes which creates environmental challenges, while certain species of plants like Imperata cylindrica constitute large portion of weeds on ...

    • CHARACTERIZATION OF SELECTED PROPERTIES OF COMPOSITES OF WASTE PAPER WITH UNTREATED BAMBOO STEM FIBRE AND RICE HUSK 

      Autor: Yusuf Ayotunde, Taofeek
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2017)
      Composite technology is an excellent approach to utilizing natural fibres and agricultural wastes, which constitute an environmental nuisance. Efforts are being made to characterize the properties of composites produced ...

    • CHARACTERIZATION OF THE FRACTURE MECHANICAL BEHAVIOR OF C-SMC MATERIALS 

      Autor: Tiefenthaler, Martin; Stelzer, Philipp S.; Chung, Chi N.; Reisecker, Volker; Major, Zoltan
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2018)
      The fracture mechanics of random discontinuous Carbon Fiber Sheet Molding Compound (C-SMC) materials compared to traditional carbon fiber composites are not well understood. An experimental study was carried out to ...

    • CHARACTERIZATION OF TITANIUM LASER WELDS 

      Autor: Chmelíčková, Hana; Hiklová, Helena; Václavek, Lukáš; Tomáštík, Jan; Čtvrtlík, Radim
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2020)
      Butt welding of commercially pure titanium Grade 1 and Ti6Al4V alloy sheets using a pulsed Nd:YAG laser KLS 246 - 102 LASAG were carried out to determine optimal values of pulse energy and pulse length to create completely ...

    • CHARACTERIZATION OF ULTRASONIC ASSISTED ADHESIVE JOINTS 

      Autor: Pauska, Rainer; Cakmak, Umut; Lottes, Rainer; Major, Zoltan
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2016)
      Joining experiments using different adhesives were carried out. In addition to the adhesive, the specimens were also treated with ultrasonic waves to improve the load carrying capacity of the joined parts. Lap joint shear ...

    • Checking the Geometric Accuracy of a Machine Tool for Selected Geometric Parameters 

      Autor: Janásek , Adam; Čep , Robert; Brychta , Josef
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)
      This paper deals with the control parameters for selected geometric accuracy measurements for a machine tool. The parameters were needed after a refurbished milling machine was purchased. After setting up the machine, it ...