Effects of the opening speed of the valve in a diaphragmless shock tube for metrological purposes

Hernández Castro, Francisco Javier (avtor), Kutin, Jože (avtor), Svete, Andrej (avtor)

To develop a measurement system for calibrating high-frequency dynamic pressure that is capable of acting as a primary dynamic pressure calibration standard, a new concept of the shock tube, called the diaphragmless shock tube, has recently been developed. In most such shock tubes, the diaphragm is replaced with a commercially available, ISTA KB fast-opening valve (FOV). In this article, a numerical model was built in OpenFOAM to investigate the effects of the opening mechanism of ISTA KB-40-100 FOV on the formation of the shock wave in a shock tube with an internal radius of 20 mm. Numerical simulations were performed for the driver-driven pressure ratio of 40 and the valve-opening speeds of 5, 10, and 20 m/s, which were compared with the case of instantaneous valve opening, and the results predicted by the ideal shock tube theory. The observed variables were the mass flow through the valve, as well as the pressure, the temperature, and the shock wave velocity in the formation region behind the valve. The results show that when the shock wave undergoes an initial acceleration, the shock front accelerates more at higher opening speeds of the valve. The results also show that the valve-opening mechanism generates a series of reflection waves that propagate into the driven section, giving the shock wave velocity an oscillatory character, which can affect the calibration and measurement capability of the shock tube as a primary high-frequency, time-varying, pressure calibration standard.

• Jezik: Angleški jezik
• Ključne besede: diaphragmless shock tubes, numerical simulations, OpenFOAM, primary calibration method, shock wave formation, time-varying pressure
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FS - Fakulteta za strojništvo
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2024
• Št. strani: Str. 158-168
• Številčenje: Vol. 24, no. 1
• PID: 20.500.12556/RUL-153408
• UDK: 531.7:519.62
• ISSN pri članku: 1530-437X
• DOI: 10.1109/JSEN.2023.3333323
• COBISS.SI-ID: 179395587
• Datum objave v RUL: 04.01.2024

Gradivo je del revije

• Naslov: IEEE sensors journal
• Skrajšan naslov: IEEE sens. j.
• Založnik: Institute of Electrical and Electronics Engineers
• ISSN: 1530-437X
• COBISS.SI-ID: 22563589

Licence

• Licenca: CC BY-NC-ND 4.0, Creative Commons Priznanje avtorstva-Nekomercialno-Brez predelav 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by-nc-nd/4.0/deed.sl
• Opis: Najbolj omejujoča licenca Creative Commons. Uporabniki lahko prenesejo in delijo delo v nekomercialne namene in ga ne smejo uporabiti za nobene druge namene.

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: brezmembranske udarne cevi, numerične simulacije, OpenFOAM, primarna kalibracijska metoda, formiranje udarnega vala, časovno spreminjajoči tlak

Projekti

• Financer: ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
• Številka projekta: J2-3054
• Naslov: Napredni sistem udarne cevi za visokofrekvenčno primarno dinamično tlačno umerjanje

• Financer: ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
• Številka projekta: P2-0223
• Naslov: Prenos toplote in snovi