Hit enter to search or ESC to close
EREA
  • About
    • About EREA
    • Members
    • Organisation
    • EREA in Flightpath 2050
    • Events
    • Position Papers
    • Publications
    • Vacancies
    • Contact us
  • Capabilities
  • Technology Infrastructures
    • TRIG
    • Catalogue
  • European Cooperation
  • Future Sky
  • News
  • Intranet

Hot Acoustics Testrig

RI-023
Wind Tunnel
Infrastructure
DLR
Description

The Hot-Acoustic Testrig, which was erected and is operated in close cooperation between DLR department of engine acoustics and Technischen Universität Berlin, chair of aero engines, is a unique facility for acoustic and aerodynamic test at surfaces exposed to high temperature and grazing flow in aero engines. The basic principle of operation is the same as for the atmospheric facility Atmospheric liner test rig (DUct aCoustic Test rig, DUCT). The HAT facility consists of two sections with microphones and the test object in between. It does have anechoic terminations at both ends in order to suppress acoustic end-reflections. For the investigation of cylindrical and plane liner samples, there are test sections with circular and rectangular cross section, respectively.

Main technical characteristics

Reynolds number –
Mach number or maximum velocity 0,6
Maximum mass flow 0,78 kg/s
Maximum temperature/ pressure 11 bar; 823 K
Duct diameter/ test section dimensions (diameter or height/ width) 0,004 m² (= diameter 70 mm)
Measurement instruments Acoustic tests at HAT
• 10 microphone probes, 5 upstream and 5 downstream of test section, respectively
• 10 additional microphone locations at the circumference (e.g. for in-situ calibration)
• Acoustic excitation via loudspeaker 160 – 2800 Hz (plane wave regime)
• Cut-on frequency of first higher-order mode 2850 Hz (at ambient temperature, Ma=0)
• Determination of dissipation curve for liners with error of less than 3%
Maximum rotating speed

Duct diameter: 70mm
Max flow temperature: 823 K
Max pressure in the duct/test section: 11 bar (abs)
Max massflow: 0.78 kg/s
Mach number (see figure) 0 – 0.7

Contact Information
Berlin (Germany)
www.dlr.de/at/en/desktopdefault.aspx/...
  • Previous PostAcoustic Wind Tunnel

  • Next PostMultifunctional Cell Tape Laying Facility (with Jointly Cooperating Industrial Robots)

Contact          Privacy Policy          Disclaimer

© 2023 EREA.

  • About
    • About EREA
    • Members
    • Organisation
    • EREA in Flightpath 2050
    • Events
    • Position Papers
    • Publications
    • Vacancies
    • Contact us
  • Capabilities
  • Technology Infrastructures
    • TRIG
    • Catalogue
  • European Cooperation
  • Future Sky
  • News
  • Intranet
EREA
To make this site work properly, we sometimes place small data files called cookies on your device.
Accept
Read more
Cookies Settings
Cookie Box Settings
Cookie Box Settings

Privacy settings

You can change these settings at any time. However, this can result in some functions no longer being available. For information on deleting the cookies, please consult your browser’s help function.
  • Block all
  • Essential
  • Functionality
  • Analytics
  • Advertising

This website will

  • Essential: Remember your cookie permission setting
  • Essential: Allow session cookies
  • Essential: Gather information you input into a contact forms newsletter and other forms across all pages
  • Essential: Keep track of what you input in a shopping cart
  • Essential: Authenticate that you are logged into your user account
  • Essential: Remember language version you selected

This website won't

  • Remember your login details
  • Functionality: Remember social media settings
  • Functionality: Remember selected region and country
  • Analytics: Keep track of your visited pages and interaction taken
  • Analytics: Keep track about your location and region based on your IP number
  • Analytics: Keep track of the time spent on each page
  • Analytics: Increase the data quality of the statistics functions
  • Advertising: Tailor information and advertising to your interests based on e.g. the content you have visited before. (Currently we do not use targeting or targeting cookies)
  • Advertising: Gather personally identifiable information such as name and location

This website will

  • Essential: Remember your cookie permission setting
  • Essential: Allow session cookies
  • Essential: Gather information you input into a contact forms newsletter and other forms across all pages
  • Essential: Keep track of what you input in a shopping cart
  • Essential: Authenticate that you are logged into your user account
  • Essential: Remember language version you selected
  • Functionality: Remember social media settings
  • Functionality: Remember selected region and country

This website won't

  • Analytics: Keep track of your visited pages and interaction taken
  • Analytics: Keep track about your location and region based on your IP number
  • Analytics: Keep track of the time spent on each page
  • Analytics: Increase the data quality of the statistics functions
  • Advertising: Tailor information and advertising to your interests based on e.g. the content you have visited before. (Currently we do not use targeting or targeting cookies)
  • Advertising: Gather personally identifiable information such as name and location

This website will

  • Essential: Remember your cookie permission setting
  • Essential: Allow session cookies
  • Essential: Gather information you input into a contact forms newsletter and other forms across all pages
  • Essential: Keep track of what you input in a shopping cart
  • Essential: Authenticate that you are logged into your user account
  • Essential: Remember language version you selected
  • Functionality: Remember social media settings
  • Functionality: Remember selected region and country
  • Analytics: Keep track of your visited pages and interaction taken
  • Analytics: Keep track about your location and region based on your IP number
  • Analytics: Keep track of the time spent on each page
  • Analytics: Increase the data quality of the statistics functions

This website won't

  • Advertising: Tailor information and advertising to your interests based on e.g. the content you have visited before. (Currently we do not use targeting or targeting cookies)
  • Advertising: Gather personally identifiable information such as name and location

This website will

  • Functionality: Remember social media settings
  • Functionality: Remember selected region and country
  • Analytics: Keep track of your visited pages and interaction taken
  • Analytics: Keep track about your location and region based on your IP number
  • Analytics: Keep track of the time spent on each page
  • Analytics: Increase the data quality of the statistics functions
  • Advertising: Tailor information and advertising to your interests based on e.g. the content you have visited before. (Currently we do not use targeting or targeting cookies)
  • Advertising: Gather personally identifiable information such as name and location

This website won't

  • Remember your login details
Save & Close