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Assessment of miniature Knowles sensor for the measurement of wall pressure

Hu, Nan (2020) Assessment of miniature Knowles sensor for the measurement of wall pressure. DAGA 2020, Hannover, Germany.

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The wall pressure fluctuations can be measured using a flush-mounted or a pinhole-mounted sensor construction. Due to signal averaging over the sensor surface [1], a small sensing area is required to minimize the high-frequency spectral attenuation. The pinhole-mounted construction is an effective means to reduce the sensing area. However, even for the pinhole-mounted construction, a miniature pressure sensor is needed to increase the resonance frequency of the pinhole construction. In the present work, two Knowles miniature sensors, model FG-23329-P07, along with Kulite miniature sensors were mounted on a flat plate model for measurement in the Acoustic Wind Tunnel Braunschweig (AWB). Both sensor types were pinhole mounted with a pinhole diameter of 0.5 mm. The wall pressure fluctuations were measured in zero pressure gradients (ZPG) for various flow velocities and also in adverse and favorable pressure gradients (APG, FPG). The mean flow velocities across the boundary layer were obtained using a single-wire hot-wire probe. The one- and two-point statistics of the wall pressure fluctuations measured by the Knowles sensors are analyzed and compared to those measured by the Kulite sensors. Based on the comparison, the performance of the Knowles sensors for the measurement of wall pressure fluctuations is assessed.

Item URL in elib:https://elib.dlr.de/135953/
Document Type:Conference or Workshop Item (Lecture)
Title:Assessment of miniature Knowles sensor for the measurement of wall pressure
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
Keywords:miniature Knowles sensor, measurement of wall pressure fluctuations
Event Title:DAGA 2020
Event Location:Hannover, Germany
Event Type:national Conference
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Systems and Cabin (old)
Location: Braunschweig
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Technical Acoustics
Deposited By: Hu, Nan
Deposited On:08 Sep 2020 07:34
Last Modified:08 Sep 2020 07:34

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