. . . . . "Specific speed Ns, is used to characterize turbomachinery speed. Common commercial and industrial practices use dimensioned versions which are of equal utility. Specific speed is most commonly used in pump applications to define the suction specific speed [1]\u2014a quasi non-dimensional number that categorizes pump impellers as to their type and proportions. In Imperial units it is defined as the speed in revolutions per minute at which a geometrically similar impeller would operate if it were of such a size as to deliver one gallon per minute against one foot of hydraulic head. In metric units flow may be in l/s or m\u00B3/s and head in m, and care must be taken to state the units used. Performance is defined as the ratio of the pump or turbine against a reference pump or turbine, which divides the actual performance figure to provide a unitless figure of merit. The resulting figure would more descriptively be called the \"ideal-reference-device-specific performance.\" This resulting unitless ratio may loosely be expressed as a \"speed,\" only because the performance of the reference ideal pump is linearly dependent on its speed, so that the ratio of [device-performance to reference-device-performance] is also the increased speed at which the reference device would need to operate, in order to produce the performance, instead of its reference speed of \"1 unit.\" Specific speed is an index used to predict desired pump or turbine performance. i.e. it predicts the general shape of a pump's impeller. It is this impeller's \"shape\" that predicts its flow and head characteristics so that the designer can then select a pump or turbine most appropriate for a particular application. Once the desired specific speed is known, basic dimensions of the unit's components can be easily calculated. Several mathematical definitions of specific speed (all of them actually ideal-device-specific) have been created for different devices and applications."@en . . "\u6BD4\u901F\u5EA6\u3068\u306F\u3001\u30DD\u30F3\u30D7\u3084\u767A\u96FB\u7528\u6C34\u8ECA\u306A\u3069\u306E\u30BF\u30FC\u30DC\u6A5F\u68B0\u306E\u5F62\u5F0F\u3092\u8868\u3059\u305F\u3081\u306B\u7528\u3044\u3089\u308C\u308B\u7269\u7406\u91CF\u3067\u3042\u308A\u3001\u6A5F\u68B0\u3092\u76F8\u4F3C\u5F62\u3067\u62E1\u5927\u7E2E\u5C0F\u3057\u305F\u3068\u304D\u3001\u5358\u4F4D\u63DA\u7A0B\u3001\u5358\u4F4D\u6D41\u91CF\u3092\u767A\u751F\u3059\u308B\u305F\u3081\u306B\u5FC5\u8981\u306A\u56DE\u8EE2\u901F\u5EA6\u3067\u3042\u308B\u3002"@ja . "Wyr\u00F3\u017Cnik szybkobie\u017Cno\u015Bci \u2013 wielko\u015B\u0107 charakteryzuj\u0105ca maszyny wirnikowe. Rozr\u00F3\u017Cniamy wyr\u00F3\u017Cnik pr\u0119dko\u015Bci dynamiczny i kinematyczny. gdzie: \u2013 wyr\u00F3\u017Cnik szybkobie\u017Cno\u015Bci (warto\u015B\u0107 bezwymiarowa) \u2013 pr\u0119dko\u015B\u0107 obrotowa (1/s) \u2013 przep\u0142yw (m\u00B3/s) w punkcie najwy\u017Cszej sprawno\u015Bci \u2013 wysoko\u015B\u0107 podnoszenia (m) w punkcie najwy\u017Cszej sprawno\u015Bci \u2013 przyspieszenie ziemskie (m/s\u00B2) Dynamiczny wyr\u00F3\u017Cnik szybkobie\u017Cno\u015Bci turbiny \u2013 pr\u0119dko\u015B\u0107 obrotowa, jak\u0105 mia\u0142aby turbina podobna do danej, pracuj\u0105c pod spadem H = 1 m i daj\u0105ca moc N = 1 KM. Kinematyczny wyr\u00F3\u017Cnik szybkobie\u017Cno\u015Bci turbiny \u2013 pr\u0119dko\u015B\u0107 obrotowa, jak\u0105 mia\u0142aby turbina podobna do danej, pracuj\u0105c pod spadem H = 1 m z przep\u0142ywem Q = 1 m\u00B3/s."@pl . . . "Wyr\u00F3\u017Cnik szybkobie\u017Cno\u015Bci \u2013 wielko\u015B\u0107 charakteryzuj\u0105ca maszyny wirnikowe. Rozr\u00F3\u017Cniamy wyr\u00F3\u017Cnik pr\u0119dko\u015Bci dynamiczny i kinematyczny. gdzie: \u2013 wyr\u00F3\u017Cnik szybkobie\u017Cno\u015Bci (warto\u015B\u0107 bezwymiarowa) \u2013 pr\u0119dko\u015B\u0107 obrotowa (1/s) \u2013 przep\u0142yw (m\u00B3/s) w punkcie najwy\u017Cszej sprawno\u015Bci \u2013 wysoko\u015B\u0107 podnoszenia (m) w punkcie najwy\u017Cszej sprawno\u015Bci \u2013 przyspieszenie ziemskie (m/s\u00B2) Dynamiczny wyr\u00F3\u017Cnik szybkobie\u017Cno\u015Bci turbiny \u2013 pr\u0119dko\u015B\u0107 obrotowa, jak\u0105 mia\u0142aby turbina podobna do danej, pracuj\u0105c pod spadem H = 1 m i daj\u0105ca moc N = 1 KM."@pl . "Die spezifische Drehzahl (Formelzeichen oder ) einer Str\u00F6mungsmaschine (Turbine, Kreiselpumpe, Laufrad) ist diejenige gedachte Drehzahl, bei der eine geometrisch \u00E4hnliche Maschine mit einer hydraulischen Fallh\u00F6he oder F\u00F6rderh\u00F6he von 1 m bei einem Volumenstrom von 1 m\u00B3/s ihren besten Wirkungsgrad hat."@de . . "Specific speed Ns, is used to characterize turbomachinery speed. Common commercial and industrial practices use dimensioned versions which are of equal utility. Specific speed is most commonly used in pump applications to define the suction specific speed [1]\u2014a quasi non-dimensional number that categorizes pump impellers as to their type and proportions. In Imperial units it is defined as the speed in revolutions per minute at which a geometrically similar impeller would operate if it were of such a size as to deliver one gallon per minute against one foot of hydraulic head. In metric units flow may be in l/s or m\u00B3/s and head in m, and care must be taken to state the units used."@en . . . . . . . . "Wyr\u00F3\u017Cnik szybkobie\u017Cno\u015Bci"@pl . "12996"^^ . "Specific speed"@en . . . . . . . . . "\u6BD4\u901F\u5EA6\u3068\u306F\u3001\u30DD\u30F3\u30D7\u3084\u767A\u96FB\u7528\u6C34\u8ECA\u306A\u3069\u306E\u30BF\u30FC\u30DC\u6A5F\u68B0\u306E\u5F62\u5F0F\u3092\u8868\u3059\u305F\u3081\u306B\u7528\u3044\u3089\u308C\u308B\u7269\u7406\u91CF\u3067\u3042\u308A\u3001\u6A5F\u68B0\u3092\u76F8\u4F3C\u5F62\u3067\u62E1\u5927\u7E2E\u5C0F\u3057\u305F\u3068\u304D\u3001\u5358\u4F4D\u63DA\u7A0B\u3001\u5358\u4F4D\u6D41\u91CF\u3092\u767A\u751F\u3059\u308B\u305F\u3081\u306B\u5FC5\u8981\u306A\u56DE\u8EE2\u901F\u5EA6\u3067\u3042\u308B\u3002"@ja . . . . . . . . . . . . . . . . . . . "5670370"^^ . . "\u6BD4\u901F\u5EA6"@ja . . . "1098964228"^^ . . . . . . "Spezifische Drehzahl"@de . . . . "Die spezifische Drehzahl (Formelzeichen oder ) einer Str\u00F6mungsmaschine (Turbine, Kreiselpumpe, Laufrad) ist diejenige gedachte Drehzahl, bei der eine geometrisch \u00E4hnliche Maschine mit einer hydraulischen Fallh\u00F6he oder F\u00F6rderh\u00F6he von 1 m bei einem Volumenstrom von 1 m\u00B3/s ihren besten Wirkungsgrad hat."@de . . . . . . . . . .