Variable mach number transonic rigid free jet nozzle

A Mach number and transonic technology, which is applied in the testing of machines/structural components, measuring devices, instruments, etc., can solve problems such as difficulty in ensuring the rectangular section of the nozzle outlet, limited test Mach number range, and poor repeatability of rigid panels. Achieve the effects of improving efficiency and practicability, simple design, and uniform flow field

Inactive Publication Date: 2015-04-01
CHINA GAS TURBINE ESTAB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the limitation of the Mach number adjustment range of the rigid nozzle and the continuous adjustment structure of the Mach number, its research is relatively lacking. Existing rigid nozzles have

Method used

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  • Variable mach number transonic rigid free jet nozzle
  • Variable mach number transonic rigid free jet nozzle
  • Variable mach number transonic rigid free jet nozzle

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Experimental program
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Embodiment Construction

[0026] See attached Figures 1 to 3 , a free-jet transonic rigid nozzle with a variable Mach number of the present invention, comprising a symmetrical left side wall 1, a right side wall 10, an upper support plate 4 and a lower support plate 5, a left side wall 1 and a right side wall The wall 10 is fixed in position by the symmetrically arranged upper support plate 4 and the lower support plate 5 and is supported and connected to form an open nozzle frame; the upper profile mechanism 2 and the lower profile mechanism 3 are symmetrically arranged on the nozzle frame Inside, it is characterized in that it also includes an upper right semicircular bearing 6, an upper left semicircular bearing 7,

[0027] Wherein the upper profile mechanism 2 includes an upper profile panel 2-1, an upper right semicircle lug 2-4, an upper left semicircle lug 2-5, an upper right semicircle lug 2-4, and an upper left semicircle lug 2-5. The left and right sides of the outlet end of the top panel 2...

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Abstract

The invention relates to a variable mach number transonic rigid free jet nozzle which comprises a left sidewall (1), a right sidewall (10), an upper support plate (4) and a lower support plate (5), wherein the left sidewall (1) and the right sidewall (10) are bilaterally symmetric, and are fixed and connected into an open nozzle frame in a supporting way by virtue of the upper support plate (4) and the lower support plate (5), which are symmetrically arranged; an upper molded surface mechanism (2) and a lower molded surface mechanism (3) are longitudinally and symmetrically arranged in the nozzle frame. The variable mach number transonic rigid free jet nozzle is characterized by also comprising an upper right semicircular bearing (6) and an upper left semicircular bearing (7). According to the variable mach number transonic rigid free jet nozzle, the pneumatic flow field is good, and a design method is reasonable; a semicircular shaft design is adopted for the tail end of a rigid molded surface, so that the area of an outlet of the open nozzle is kept constant, and an airflow field at the outlet of the nozzle is uniform and regular; an obvious uniform test area can be formed at the outlet of the nozzle, so that test requirements are met, and good effects are achieved in a high-altitude stand air blowing test.

Description

Technical field: [0001] Wind tunnel test or high-altitude platform aerodynamic test of aero-engine. Background technique: [0002] The free jet test is an important means of simulating the high-altitude inlet-engine matching test. The function of the air intake device is to make the air flow passing through the device reach the simulated Mach number, total pressure, Parameter conditions such as airflow angle. The free jet inlet device (referred to as the nozzle) is the core section to establish the free jet flow field, and its design quality directly determines the quality of the free jet flow field, determines the reliability and accuracy of the free jet test data, and determines the The test capability of the free jet and the operating efficiency of the cabin are improved. [0003] The transonic nozzle adopts a shrinking and expanding structure. In the contraction section, the airflow is uniformly accelerated from the low-pressure sound velocity to the sonic velocity, an...

Claims

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Application Information

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IPC IPC(8): G01M9/04
Inventor 吴锋陈鹏飞冯旭栋张有张正伟
Owner CHINA GAS TURBINE ESTAB
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