{"@type": "dcat:Dataset", "DOI": "10.21947/1483637", "accessLevel": "public", "bureauCode": ["019:20"], "contactPoint": {"@type": "vcard:Contact", "fn": "Lee Fingersh", "hasEmail": "mailto:lee.fingersh@nrel.gov"}, "dataQuality": true, "description": "**Overview**\n\nSequence E: Yaw Releases (P)\n\nThis test sequence used a downwind, rigid turbine with a 3.4\u00b0 cone angle. The wind speeds\nranged from 7 m/s to 17 m/s. Initial yaw angles of \u00b190\u00b0 were achieved. The blade tip pitch was\n3\u00b0. The rotor rotated at 72 RPM. Blade and probe pressure measurements were collected. The\nteeter dampers were replaced with rigid links, and these two channels were flagged as not\napplicable by setting the measured values in the data file to \u201399999.99 Nm. The teeter link load\ncell was pre-tensioned to 40,000 N. The turbine was positioned at each specified yaw angle. A 30-\nsecond data set was collected with the yaw brake engaged. These points used a letter for the last\ndigit beginning with A and proceeding through the alphabet as repeat points were needed. These\npoints were plotted and compared to ascertain the functionality of the instrumentation. The files\nending in numbers beginning with 0 and increasing with each repetition represent yaw release\npoints.\n\nOnce the fixed-position yaw test was complete, the yaw drive was engaged to hold the turbine.\nThe yaw brake was released, and the yaw drive was disabled allowing the turbine to yaw freely.\nThe yaw drive was disabled about 5 seconds into the campaign, and the turbine was allowed to\nyaw freely for the rest of the 30-second duration. When the yaw drive is disabled, no torque is\napplied to the motor, and the inertia and yawing force of the nacelle and rotor overcomes the\nfriction and inertia of the yaw gear and motor. The yaw releases were repeated five times at each\ncondition. Four additional campaigns were collected to determine the turbine\u2019s natural yaw error\nby releasing the brake at 0\u00b0 yaw error. These file names use the E designation, followed by two\ndigits for wind speed, followed by XXXX, followed by the repetition digit.\n\n**Data Details**\n\nFile naming information can be found in the attached Word document  \"Sequence E Filename Key\", copied from the Phase VI Test Report.", "distribution": [{"@type": "dcat:Distribution", "accessURL": "https://a2e.energy.gov/data/uae6/uae6.z04.00", "description": "Main dataset landing page with options to request/download", "format": "00", "mediaType": "application/octet-stream", "title": "uae6/uae6.z04.00"}], "identifier": "https://data.openei.org/submissions/4200", "issued": "2018-11-28T00:00:00Z", "keyword": ["a2e", "atmosphere to electrons", "wind", "weto", "eere", "uae6", "Unsteady Aerodynamics Experiment Phase VI NREL-NASA Ames Wind Tunnel Experiment", "UAE6", "Wind Tunnel Tests Data", "Sequence E", "Raw Data", "z04", "00"], "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": {"@type": "org:Organization", "name": "Wind Energy Technologies Office (WETO)"}, "title": "UAE6 - Wind Tunnel Tests Data - UAE6 - Sequence E - Raw Data"}