4 results about "Supersonic nozzle" patented technology

This invention relates to the field of supersonic inlet start-up and active flow control technology, aiming to solve the problems of inlet flow separation, shock wave boundary layer interference, and start-up lag in existing scramjet engines. It provides a miniature supersonic nozzle array device and engine for enhancing inlet start-up. The miniature supersonic nozzle array device includes a rotating mechanism on which multiple nozzles are mounted, arranged at intervals. The airflow channel inside each nozzle is an acceleration channel, and the airflow channel between two adjacent nozzles is a deceleration channel. The acceleration channel is sequentially divided into an acceleration channel inlet section, a central contraction section, and an acceleration channel outlet section along the gas flow direction. The cross-sectional size of the central contraction section is smaller than that of the acceleration channel inlet section and the acceleration channel outlet section. This invention effectively solves the problems of shock wave boundary layer interference, flow separation, and start-up lag at the inlet lip under high Mach number conditions.

The application discloses a built-in multi-pipe supersonic condensation-cyclone-coalescence filter, which comprises a shell, a cyclone pre-separation module, a supersonic nozzle steam condensation module, a multi-stage guide vane type mist cyclone separation module and a coalescence filter core filter module are sequentially arranged in the shell from bottom to top. The filter can not only separate free liquid droplets carried in natural gas, but also deeply remove lubricating oil steam, hydrocarbons and water vapor contained in the natural gas through phase change condensation. The filter has the characteristics of large operation flexibility and high separation efficiency.

This invention discloses a supersonic nozzle and planar blade cascade tester, comprising a nozzle box, an inlet flange disposed at the air inlet of the nozzle box, and an outlet flange disposed at the air outlet of the nozzle box. The nozzle box includes two symmetrically arranged side plates and two symmetrically arranged profiled panels. The two side plates and the two profiled panels together form the flow channel of the nozzle box. The inner wall surface of the profiled panels is a continuously changing arc surface, causing the flow channel to have a structure of first contraction and then expansion along the air inlet direction. The minimum distance between the flow channels is the throat. An adjustment mechanism is disposed on the profiled panels. The adjustment mechanism is used to drive the inner wall surface of the profiled panels to move perpendicular to the air inlet direction to adjust the size R of the throat. The size R is the distance between the flow channels of the two profiled panels at the throat. The supersonic nozzle of this invention can realize the area adjustment of the throat flow channel surface, and can ensure that the Mach number and flow field uniformity at the nozzle box exit meet the design requirements.

The present application relates to a kind of steam flow control device in well, including center tube, it is provided with wedge groove and step portion;Cap, it is installed on center tube;Nozzle assembly, it includes nozzle seat and supersonic nozzle installed on nozzle seat, nozzle assembly is installed on wedge groove;Screen assembly, it includes screen rib and screen installed on screen rib, one end of screen assembly is sleeved at the step portion of center tube and the other end extends along center tube;Cap, one end is connected on cap and the other end is abutted on screen assembly, cap is in contact with nozzle assembly and compresses nozzle assembly;Lower retaining ring, it is provided on center tube and is connected with the other end of screen assembly.The present application also relates to a string with the above device.The present application can realize effective and accurate control of steam flow;Can play a protective role to oil well;And can realize the steam flow control of multilayer section.