sonic type flare

[0605]

Пожалуйста, помогите перевести.sonic type flare

Выражение встречается в следующем контексте:
Тип факельного наконечника. HP flare tip FT-1 is a sonic type flare.
Заранее спасибо

[D-50]

Sonic type flares are inherently smokeless and thus have a low emissivity.

A conventional flare, especially at low flowing rates if assist gas or steam isn't being used could be very smoky (as the flaring rate increases, the high velocity gas exiting the tip entrains more and more air thus reducing the smoke and its emissivity value even without steam or assist gas though that's not to imply it won't be smoky).

[0605]

Thanks a lot!