Vpliv vrste plina na merjenje pretoka z zvočnimi merilnimi šobami

magistrsko delo magistrskega študijskega programa II. stopnje Strojništvo

Matej Kavšek (Author), Jože Kutin (Mentor)

Abstract

V magistrskem delu smo obravnavali metodo merjenja masnega pretoka plina po modelu Venturijeve kritične šobe. Predstavljena so fizikalna izhodišča delovanja kritične šobe, na katerih temelji prilagojeni matematični model za izračun masnega pretoka. Predstavljeno je preizkuševališče, na katerem smo z meritvami ugotavljali vpliv spremembe vrste plina na napoved masnega pretoka v sistemu, umerjenem na suhi zrak, pri čemer smo v modelu za preračun upoštevali zgolj spremembo snovskih lastnosti. Ugotovili smo, da meritve modela, umerjenega za suhi zrak, ne moremo uporabiti za računanje masnega pretoka za plina argon in didušikov oksid, lahko pa jo lahko uporabimo za meritev s kisikom in dušikom.

Keywords

magistrske naloge;tokovne razmere;zvočne šobe;kritične šobe;pretočni koeficient;masni pretok;matematični modeli;standard ISO9300:2005;

Data

Language:	Slovenian
Year of publishing:	2020
Typology:	2.09 - Master's Thesis
Organization:	UL FS - Faculty of Mechanical Engineering
Publisher:	[M. Kavšek]
UDC:	532.57:544.277:62-225(043.2)
COBISS:	28121603
Views:	847
Downloads:	123
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	The influence of gas type on flow measurement with sonic measuring nozzles
Secondary abstract:	This master's thesis deals with the gas flow measuring method according to the Venturi critical nozzle model. The physical starting points of the critical nozzle operation are presented, on which the adapted mathematical model for calculating the mass flow is based. A test site is presented, where measurements were performed to determine the effect of a change in the type of gas on the mass flow forecast if the system is calibrated to dry air and only the change in material properties is taken into account in the calculation model. It was found that the measurements of the model calibrated for dry air cannot be used to calculate the mass flow for argon and nitrous oxide and can be used for the measurement with oxygen and nitrogen.
Secondary keywords:	master thesis;flow conditions;sonic nozzles;discharge coefficient;mass flow;mathematical model;
Type (COBISS):	Master's thesis/paper
Study programme:	0
Embargo end date (OpenAIRE):	1970-01-01
Thesis comment:	Univ. Ljubljana, Fak. za strojništvo
Pages:	XXII, 64 str.
ID:	11983462