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Circumferential-deflecting self-circulation casing treatment device for contra-rotating gas compressor

A casing processing and compressor technology, which is applied to the components of pumping devices for elastic fluids, machines/engines, mechanical equipment, etc., can solve the problems that counter-rotating compressors cannot be used, and achieve the goal of improving stall margin Effect

Active Publication Date: 2021-07-13
NORTHWESTERN POLYTECHNICAL UNIV
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

The self-circulating casing design method proposed based on the conventional compressor cannot be applied to the counter-rotating compressor of the present invention

Method used

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  • Circumferential-deflecting self-circulation casing treatment device for contra-rotating gas compressor
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  • Circumferential-deflecting self-circulation casing treatment device for contra-rotating gas compressor

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Embodiment Construction

[0029] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

[0030] The present invention is a self-circulating casing processing device applied to counter-rotating compressors, see Figure 1 ~ Figure 3. The self-circulating casing processing device can realize the independent adjustment of each parameter of the self-circulating casing, and obtain the geometric parameters with the best expansion and stabilization effect. The suction angle of the suction section is 1...

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Abstract

The invention relates to a circumferential-deflecting self-circulation casing treatment for a contra-rotating gas compressor, and belongs to the technical field of internal flow control of turbomachinery. The circumferential-deflecting self-circulation casing treatment for the contra-rotating gas compressor comprises an air suction section, a bridge road and an air injection section. The two-dimensional molded line of the air suction section is composed of two semicircular arc lines, and the two-dimensional molded line of the air injection section is formed by NURBS fitting. The stall margin of a contra-rotating compressor rotor R2 can be remarkably improved through self-circulation casing treatment. Compared with casing treatment of other forms, the self-circulation casing treatment of the design can reduce efficiency loss. The stability expansion effect of the self-circulation casing treatment on a certain two-stage contra-rotating gas compressor is examined. A self-circulation casing treatment air suction port is spaced from the downstream of the front edge of the blade top of the rear-row rotor R2 by 25% of the axial chord length, an air jet port is spaced from the upstream of the front edge of the blade top of the rear-row rotor R2 by 40% of the axial chord length, the air jet angle and the air suction angle are 10 degrees, and the throat area ratio is 4.0. Researches show that the stall margin of the contra-rotating gas compressor can be obviously improved through self-circulation casing treatment at the designed rotating speed of 70%-100%.

Description

technical field [0001] The invention relates to the technical field of internal flow control of turbomachinery, and is a counter-rotating compressor applied to a new type of aerodynamic layout, and a device for improving the stall margin of the counter-rotating compressor. Self-circulating disposal receiver for easy movement to the position. Background technique [0002] Large thrust-to-weight ratio and wide margin are the goals that aero-engines are constantly pursuing. Since the elimination of the intermediate-stage vane structure in the counter-rotating compressor greatly reduces the weight of the compressor and reduces the axial size, it is considered to be one of the important technologies for increasing the thrust-to-weight ratio of the engine. one. Compared with conventional compressors, the airflow from the front rotor is not combed by the stator blade row and directly enters the rear rotor, and the wake generated by the front rotor enhances the inhomogeneity of the...

Claims

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Application Information

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IPC IPC(8): F04D29/52F04D29/54
CPCF04D29/522F04D29/541
Inventor 高丽敏郭彦超王磊茅晓晨
Owner NORTHWESTERN POLYTECHNICAL UNIV
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