Zasnova naprave za merjenje potiska in izkoristka ladijskih vijakov

Kočevar, Jakob (author), Novak, Lovrenc (mentor), Petkovšek, Martin (co-mentor)

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.

• Language: Slovenian
• Keywords: ladijski vijak, merilna naprava, princip delovanja ladijskega vijaka, kanal s prosto gladino, konstruiranje, preizkušanje
• Work type: Bachelor thesis/paper
• Typology: 2.11 - Undergraduate Thesis
• Organization: FS - Faculty of Mechanical Engineering
• Place of publishing: Ljubljana
• Publisher: [J. Kočevar]
• Year: 2023
• Number of pages: XX, 53 str.
• PID: 20.500.12556/RUL-152651
• UDC: 629.5.024.71(043.2)
• COBISS.SI-ID: 183793155
• Publication date in RUL: 02.12.2023

Secondary language

• Language: English
• Title: Design of a device for measuring thrust and efficiency of ship propellers

Abstract

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.

• Keywords: ship propeller, measuring device, principle of operation of the propeller, chanel with free surface, design, testing