{"id":557477,"date":"2024-11-05T18:18:09","date_gmt":"2024-11-05T18:18:09","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/esdu-110052011\/"},"modified":"2024-11-05T18:18:09","modified_gmt":"2024-11-05T18:18:09","slug":"esdu-110052011","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/esdu\/esdu-110052011\/","title":{"rendered":"ESDU 11005:2011"},"content":{"rendered":"<p>\n\tESDU 11005 introduces a computer program for estimating the<br \/>\nnoise from an isolated single rotating propeller in uniform motion<br \/>\nor stationary in a lossless atmosphere without temperature<br \/>\ngradients or wind. Thickness noise and noise due to tangential and<br \/>\naxial loading are treated. The airflow need not be parallel to the<br \/>\npropeller axis. The observer may be stationary or on the aircraft<br \/>\nwhich may be climbing or descending. Noise due to non-linear<br \/>\neffects arises at tip relative Mach numbers exceeding 0.9 but is<br \/>\nneglected in the program. Input required includes the radial<br \/>\ndistributions of chord, thickness, blade angle, coordinates of the<br \/>\nmid-chord line, relative Mach number, air angle, and the steady and<br \/>\nunsteady drag and lift coefficients. If unsteady lift and drag<br \/>\ncoefficient distributions are not available, an option is provided<br \/>\nto have the lift distribution calculated within the program using<br \/>\nthe method of ESDU 96027. The omission of the drag coefficient<br \/>\ndistribution is thought to have a negligible effect on the noise<br \/>\ncalculation in comparison with the lift coefficient distribution.<br \/>\nThere is an option to output results in either reception<br \/>\ncoordinates (based on the location of the propeller when the noise<br \/>\nreaches the observer) or emission coordinates (based on its<br \/>\nlocation when the noise was emitted). Details of the input and<br \/>\noutput format are illustrated by a worked example.\n\t<\/p>\n","protected":false},"excerpt":{"rendered":"<p><b>Prediction of Near-Field and Far-Field Harmonic Noise from Subsonic Propellers with Non-Axial Inflow<\/b><\/p>\n<table style=\"width: 100%\" border=\"0\" cellspacing=\"0\" cellpadding=\"0\">\n<tbody>\n<tr>\n<td>Published By<\/td>\n<td>Publication Date<\/td>\n<td>Number of Pages<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/pdfstandards.shop\/product-category\/publishers\/esdu\/\"><b>ESDU<\/b><\/a><\/td>\n<td>2011-07<\/td>\n<td>NA<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":0,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[2675],"product_tag":[],"class_list":{"0":"post-557477","1":"product","2":"type-product","3":"status-publish","5":"product_cat-esdu","7":"first","8":"instock","9":"sold-individually","10":"shipping-taxable","11":"purchasable","12":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/557477","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=557477"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=557477"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=557477"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}