20.500.12556/RUL-152651 Zasnova naprave za merjenje potiska in izkoristka ladijskih vijakov Design of a device for measuring thrust and efficiency of ship propellers Cilj diplomskega dela je zasnova in izdelava naprave za merjenje potiska in izkoristka modela ladijskih vijakov. V začetku dela so predstavljene teoretične osnove delovanja ladijskega vijaka. Zatem sledi predstavitev procesa izdelave naprave za merjenje ladijskega vijaka v kanalu s prosto gladino, pri čemer voda v kanalu miruje, vijak pa se skupaj z merilno opremo premika. Geometrija merjenega vijaka je temeljila na prosto dostopnem 3D modelu Potsdam vijaka PPTC. Za merjenje karakteristik ladijskega vijaka smo na osnovi brezdimenzijskih števil najprej določili delovne točke. Meritve smo izvedli pri treh vrtilnih hitrostih vijaka in različnih koeficientih napredovanja. Rezultate merjenih veličin smo primerjali z referenčnimi meritvami vijaka PPTC in ugotovili podobne trende. Na koncu dela so predstavljene možne izboljšave naprave in podani predlogi za nadaljnje delo. The goal of the thesis is the design and construction of a device for measuring the thrust and efficiency of ship propellers. The beginning of the work presents the theoretical foundations of the operation of a ship propeller. This is followed by the presentation of the process of creating a device for testing the ship propeller in an open water chanel, where the water in the channel is stationary, while the propeller, and the measuring equipment, moves. The geometry of the measured propeller was based on the freely available 3D model of the Potsdam propeller (PPTC). To measure the characteristics of the ship propeller, we first determined the operating points based on dimensionless numbers. Measurements were carried out at three rotational speeds of the propeller and different advance coefficients. We compared the results of the measured quantities with the reference measurements of the PPTC propeller and found similar trends. In the conclusion of the work, possible improvements to the device are presented, and suggestions for further work are provided. ladijski vijak merilna naprava princip delovanja ladijskega vijaka kanal s prosto gladino konstruiranje preizkušanje ship propeller measuring device principle of operation of the propeller chanel with free surface design testing true false false [J. Kočevar] Slovenski jezik Angleški jezik Diplomsko delo/naloga 2023-12-02 08:30:41 2023-12-02 08:30:44 2024-02-05 13:53:21 0000-00-00 00:00:00 2023 0 Ljubljana 0 XX, 53 str. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 629.5.024.71(043.2) 259834 183793155 32587.pdf 32587.pdf 1 D7D1C51C68F4A05EC5C7CFA4D78CD9CD 9293228c1539f2ca940aeee29e89444ba7f842c79b2e09dcb0a3f769025c5288 b3ee60ce-90e4-11ee-bfca-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=178248 32588.pdf 32588.pdf 1 87F3F29AD0057E99621C3F2225627B8F 55ef6bbaca0f3616b451eff71b3351151095dc2f6727ff2a0b638b13515ad2c1 b3ef9b56-90e4-11ee-bfca-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=178249 32589.pdf 32589.pdf 1 A8ED0380D5098A731F0263D5E37A9480 48259481ec5915b6247e3702125b090cf0df059951250902627352409e2117a7 b3eff844-90e4-11ee-bfca-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=178250 Fakulteta za strojništvo 0 0 0