UAE6 - Wind Tunnel Tests Data - UAE6 - Sequence E - Raw Data

Overview

Sequence E: Yaw Releases (P)

This test sequence used a downwind, rigid turbine with a 3.4° cone angle. The wind speeds ranged from 7 m/s to 17 m/s. Initial yaw angles of ±90° were achieved. The blade tip pitch was 3°. The rotor rotated at 72 RPM. Blade and probe pressure measurements were collected. The teeter dampers were replaced with rigid links, and these two channels were flagged as not applicable by setting the measured values in the data file to –99999.99 Nm. The teeter link load cell was pre-tensioned to 40,000 N. The turbine was positioned at each specified yaw angle. A 30- second data set was collected with the yaw brake engaged. These points used a letter for the last digit beginning with A and proceeding through the alphabet as repeat points were needed. These points were plotted and compared to ascertain the functionality of the instrumentation. The files ending in numbers beginning with 0 and increasing with each repetition represent yaw release points.

Once the fixed-position yaw test was complete, the yaw drive was engaged to hold the turbine. The yaw brake was released, and the yaw drive was disabled allowing the turbine to yaw freely. The yaw drive was disabled about 5 seconds into the campaign, and the turbine was allowed to yaw freely for the rest of the 30-second duration. When the yaw drive is disabled, no torque is applied to the motor, and the inertia and yawing force of the nacelle and rotor overcomes the friction and inertia of the yaw gear and motor. The yaw releases were repeated five times at each condition. Four additional campaigns were collected to determine the turbine’s natural yaw error by releasing the brake at 0° yaw error. These file names use the E designation, followed by two digits for wind speed, followed by XXXX, followed by the repetition digit.

Data Details

File naming information can be found in the attached Word document "Sequence E Filename Key", copied from the Phase VI Test Report.

Data and Resources

Field Value
DOI 10.21947/1483637
accessLevel public
bureauCode {019:20}
catalog_@context https://openei.org/data.json
catalog_@id https://openei.org/data.json
catalog_conformsTo https://project-open-data.cio.gov/v1.1/schema
catalog_describedBy https://project-open-data.cio.gov/v1.1/schema/catalog.json
dataQuality true
identifier https://data.openei.org/submissions/4200
issued 2018-11-28T00:00:00Z
landingPage https://a2e.energy.gov/data/uae6/uae6.z04.00
license https://creativecommons.org/licenses/by/4.0/
modified 2020-03-27T00:00:00Z
programCode {019:010}
projectNumber 67025
projectTitle Wind Data Hub
publisher Wind Energy Technologies Office (WETO)
resource-type Dataset
source_datajson_identifier true
source_hash 45f12901044cb54c8a31396a6d8dae11c1901785
source_schema_version 1.1
Groups
  • AmeriGEOSS
  • National Provider
  • North America
Tags
  • 00
  • a2e
  • amerigeo
  • amerigeoss
  • atmosphere-to-electrons
  • ckan
  • eere
  • geo
  • geoss
  • national
  • north-america
  • raw-data
  • sequence-e
  • uae6
  • united-states
  • unsteady-aerodynamics-experiment-phase-vi-nrel-nasa-ames-wind-tunnel-experiment
  • weto
  • wind
  • wind-tunnel-tests-data
  • z04
isopen True
license_id cc-by
license_title Creative Commons Attribution
license_url http://www.opendefinition.org/licenses/cc-by
maintainer Lee Fingersh
maintainer_email lee.fingersh@nrel.gov
metadata_created 2025-11-22T15:22:29.623609
metadata_modified 2025-11-22T15:22:29.623613
notes **Overview** Sequence E: Yaw Releases (P) This test sequence used a downwind, rigid turbine with a 3.4° cone angle. The wind speeds ranged from 7 m/s to 17 m/s. Initial yaw angles of ±90° were achieved. The blade tip pitch was 3°. The rotor rotated at 72 RPM. Blade and probe pressure measurements were collected. The teeter dampers were replaced with rigid links, and these two channels were flagged as not applicable by setting the measured values in the data file to –99999.99 Nm. The teeter link load cell was pre-tensioned to 40,000 N. The turbine was positioned at each specified yaw angle. A 30- second data set was collected with the yaw brake engaged. These points used a letter for the last digit beginning with A and proceeding through the alphabet as repeat points were needed. These points were plotted and compared to ascertain the functionality of the instrumentation. The files ending in numbers beginning with 0 and increasing with each repetition represent yaw release points. Once the fixed-position yaw test was complete, the yaw drive was engaged to hold the turbine. The yaw brake was released, and the yaw drive was disabled allowing the turbine to yaw freely. The yaw drive was disabled about 5 seconds into the campaign, and the turbine was allowed to yaw freely for the rest of the 30-second duration. When the yaw drive is disabled, no torque is applied to the motor, and the inertia and yawing force of the nacelle and rotor overcomes the friction and inertia of the yaw gear and motor. The yaw releases were repeated five times at each condition. Four additional campaigns were collected to determine the turbine’s natural yaw error by releasing the brake at 0° yaw error. These file names use the E designation, followed by two digits for wind speed, followed by XXXX, followed by the repetition digit. **Data Details** File naming information can be found in the attached Word document "Sequence E Filename Key", copied from the Phase VI Test Report.
num_resources 1
num_tags 20
title UAE6 - Wind Tunnel Tests Data - UAE6 - Sequence E - Raw Data