{"id":9278,"date":"2024-08-24T13:26:23","date_gmt":"2024-08-24T05:26:23","guid":{"rendered":"https:\/\/tommykwan.com\/blog\/?p=9278"},"modified":"2024-08-24T14:00:49","modified_gmt":"2024-08-24T06:00:49","slug":"eddy-dissipation-rate-edr-%e4%b8%80%e5%80%8b%e5%90%8cturbulence-intensity-%e6%9c%89%e9%97%9c%e6%97%a2%e8%a9%9e%e5%bd%99","status":"publish","type":"post","link":"https:\/\/tommykwan.com\/blog\/aviation\/eddy-dissipation-rate-edr-%e4%b8%80%e5%80%8b%e5%90%8cturbulence-intensity-%e6%9c%89%e9%97%9c%e6%97%a2%e8%a9%9e%e5%bd%99\/","title":{"rendered":"Eddy Dissipation Rate (EDR) – \u4e00\u500b\u540cturbulence intensity \u6709\u95dc\u65e2\u8a5e\u5f59!"},"content":{"rendered":"

Reference: https:\/\/www.flyingmag.com\/how-do-you-interpret-an-eddy-dissipation-rate\/<\/a><\/p>\n

 <\/p>\n

EDR<\/strong> quantifies turbulence<\/strong> for a specific<\/strong> aircraft, and it\u2019s not<\/strong> a measure of the likelihood<\/strong> of turbulence\u2014just<\/strong> the intensity.<\/strong><\/p>\n

 <\/p>\n

ERR – Eddy Dissipation Rate \u7684\u4e09\u4ef6\u4e8b<\/span><\/p>\n

    \n
  1. refer to specific aircraft (type specific)<\/span><\/li>\n
  2. describe the intensity of turbulence<\/span><\/li>\n
  3. \u540cturbulence \u767c\u751f\u6a5f\u7387\u7121\u95dc<\/span><\/li>\n<\/ol>\n

     <\/p>\n

    EDR \u6108\u9ad8\u4ee3\u8868Turbulence \u5c0d\u679c\u985e\u6a5f\u65e2\u5f71\u97ff\u6108\u5927<\/span><\/p>\n

    EDR is an observed or forecast value that is between 0 and 1 with 0 representing perfectly smooth air and 1 implying supercell thunderstorm level of mixing.<\/p>\n

     <\/p>\n

    Note:<\/p>\n

    EDR is an aircraft-independent meteorological field expressed in m\u00b2\/s\u00b3 (meters squared per seconds cubed). Simply put, an atmosphere that causes eddies to dissipate rapidly is one that is likely turbulent. Most importantly, EDR is not a measure of the likelihood of turbulence, just the intensity.<\/p>\n

     <\/p>\n

    EDR \u4fc2 aircraft type specific information<\/span><\/p>\n

    EDR is not a “one size fits all”. This means an EDR value of 18 may produce moderate turbulence for a Cirrus SR20, but will be considered light turbulence for a Boeing 737.<\/p>\n

     <\/p>\n

     <\/p>\n

    \u6eab\u6545\u77e5\u65b0 – Other background knowledge :<\/p>\n

    What we should do when come across turbulence in flight?<\/span><\/p>\n

    When confronted with moderate or greater turbulence while in flight, the first response<\/strong> is to slow down<\/strong> below the aircraft\u2019s maneuvering speed <\/strong>(a.k.a turbulence penetration speed)<\/p>\n

    Who define this “turbulence penetration speed” \/ What factor affect the “turbulence penetration speed”?<\/span><\/p>\n

    Maneuvering speed is directly dependent on the aircraft\u2019s weight. In other words, the heavier<\/strong> the aircraft<\/strong>, the higher<\/strong> the maneuvering speed<\/strong>.<\/p>\n

     <\/p>\n

    Why we need to reduce to (fly at) the so called “aircraft\u2019s maneuvering speed”?<\/span><\/p>\n

    By reducing airspeed, the goal is to reduce the forces (or load) on the aircraft parts that could fail as the aircraft accelerates and decelerates in moderate or greater turbulence. (\u543e\u6703\u6574\u721b\u96bb\u6a5f, \u4f46\u53c8\u5920speed \u53bbgenerate sufficient lift for the acft to fly through the turbulence area)<\/p>\n","protected":false},"excerpt":{"rendered":"

    Reference: https:\/\/www.flyingmag.com\/how-do-you-interpret-an-eddy-dissipation-rate\/   EDR quantifies turbulence for a specific aircraft, and it\u2019s not a measure of the likelihood of turbulence\u2014just the intensity.   ERR – Eddy Dissipation Rate \u7684\u4e09\u4ef6\u4e8b refer to specific aircraft (type specific) describe the intensity of turbulence \u540cturbulence \u767c\u751f\u6a5f\u7387\u7121\u95dc   EDR \u6108\u9ad8\u4ee3\u8868Turbulence \u5c0d\u679c\u985e\u6a5f\u65e2\u5f71\u97ff\u6108\u5927 EDR is an observed or forecast value that is Read More<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[64],"tags":[],"class_list":["post-9278","post","type-post","status-publish","format-standard","hentry","category-aviation"],"_links":{"self":[{"href":"https:\/\/tommykwan.com\/blog\/wp-json\/wp\/v2\/posts\/9278","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/tommykwan.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/tommykwan.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/tommykwan.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/tommykwan.com\/blog\/wp-json\/wp\/v2\/comments?post=9278"}],"version-history":[{"count":10,"href":"https:\/\/tommykwan.com\/blog\/wp-json\/wp\/v2\/posts\/9278\/revisions"}],"predecessor-version":[{"id":9295,"href":"https:\/\/tommykwan.com\/blog\/wp-json\/wp\/v2\/posts\/9278\/revisions\/9295"}],"wp:attachment":[{"href":"https:\/\/tommykwan.com\/blog\/wp-json\/wp\/v2\/media?parent=9278"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/tommykwan.com\/blog\/wp-json\/wp\/v2\/categories?post=9278"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/tommykwan.com\/blog\/wp-json\/wp\/v2\/tags?post=9278"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}