Določitev količnika upora kvadra z Jones in Betz merilnima metodama

Pekolj, David (author), Šajn, Viktor (mentor)

Za mnoge inženirske namene je potrebno vsaj približno poznati koeficiente zračnega upora najrazličnejših predmetov. Vrednost koeficienta lahko v vetrovniku ugotovimo z dotičnimi metodami z nosilcem, ali pa z nedotično metodo meritve tlakov pred in za predmetom. Teoriji po Betzu in Jonesu nam iz teh meritev omogočata določitev približne vrednosti koeficienta zračnega upora, ki se od teoretičnih vrednosti razlikujejo v našem primeru do +/- 5%.

• Language: Slovenian
• Keywords: metoda po Betzu, metoda po Jonesu, meritve v vetrovniku, empirični izračun koeficienta upora.
• Work type: Final paper
• Typology: 2.11 - Undergraduate Thesis
• Organization: FS - Faculty of Mechanical Engineering
• Publisher: [D. Pekolj]
• Year: 2018
• PID: 20.500.12556/RUL-103264
• UDC: 533.6.013.12(043.2)
• COBISS.SI-ID: 16415771
• Publication date in RUL: 15.09.2018

Secondary language

• Language: English
• Title: Determination of parallele piped drag coeficiant with Jones and Betz measurement methods

Abstract

To be able to perform various engineering procedures, we should at least approximately know drag coefficients of different objects. In the wind tunnel, the coefficient can be measured with converge method using a carrier, or with untouchable method of measuring pressure in front of and behind the object. Betz and Jones Theory enables us to pinpoint approxinate drag coefficients from these results, which in our case differ from theoretical results for +/- 5%.

• Keywords: Betz method, Jones method, wind tunnel measurements, empirical calculation of the drag coefficient.