burble

burble
i. A turbulent eddy in fluid flow caused by roughness near the boundary surface or loss of energy in the laminar flowing fluid.
ii. A separation or breakdown of the laminar flow past a body; the eddying or turbulent flow resulting from this. Laminar airflow is one in which the air over a surface is in smooth layers and without any turbulence. Burble occurs over an airfoil operating at an angle of attack greater than the angle of maximum lift (i.e., stalling angle), resulting in a loss of lift and an increase of drag. Burble also occurs when a subsonic wing is at or near a compressibility Mach number when the wing first suffers a sudden separation of airflow resulting from a shock-wave formation.

Aviation dictionary. 2014.

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Look at other dictionaries:

  • burble — urble v. to to make a burbling sound; used of water, especially brooks. Syn: ripple, babble, guggle, bubble, gurgle. [WordNet 1.5] …   The Collaborative International Dictionary of English

  • burble — (v.) make a bubbling sound, c.1300, onomatopoeic. Related: Burbled; burbling …   Etymology dictionary

  • burble — ► VERB 1) make a continuous murmuring noise. 2) speak unintelligibly and at length. ► NOUN 1) continuous murmuring noise. 2) rambling speech. ORIGIN imitative …   English terms dictionary

  • burble — [bʉr′bəl] vi. burbled, burbling [ME burbelen, to bubble; of echoic orig.] 1. to make a gurgling or bubbling sound 2. to babble as a child does n. Aeron. the separation and breakup of the streamline flow of air, esp. over the surface of a wing at… …   English World dictionary

  • burble — I UK [ˈbɜː(r)b(ə)l] / US [ˈbɜrb(ə)l] verb Word forms burble : present tense I/you/we/they burble he/she/it burbles present participle burbling past tense burbled past participle burbled 1) burble or burble on [intransitive/transitive] to talk… …   English dictionary

  • burble — bur|ble1 [ bɜrbl ] verb 1. ) intransitive to make a sound like water flowing 2. ) burble or burble on intransitive or transitive to talk fast about something for a long time, especially in a way that annoys people because they cannot understand… …   Usage of the words and phrases in modern English

  • burble — bur|ble [ˈbə:bəl US ˈbə:r ] v [Date: 1300 1400; Origin: From the sound] 1.) [I and T] to talk about something in a confused way that is difficult to understand burble on/away ▪ I had to listen for an hour while she burbled away. 2.) to make a… …   Dictionary of contemporary English

  • burble — verb 1 (I, T) to talk about something in a confused way that is difficult to understand: Maggie kept burbling away about how difficult things were. 2 (I) to make a sound like a stream flowing over stones burble noun (C) …   Longman dictionary of contemporary English

  • burble point — noun : the angle of attack of an airfoil at which the first signs of burble appear * * * burble point or burbling point noun (aerodynamics) The angle of attack at which the sharp drop in the ratio of lift to drag (an effect of burbling too near… …   Useful english dictionary

  • burble point — i. A point reached in an increasing angle of attack at which burble begins. Also called a burble angle. See also burble. ii. The Mach number at which a subsonic wing first suffers a sudden separation of airflow resulting from a shock wave… …   Aviation dictionary

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