Experience in Scaling the Design of Low-Emission Combustors for use in Gas-Turbine Units of Various Power
- PDF / 1,008,929 Bytes
- 6 Pages / 594 x 792 pts Page_size
- 8 Downloads / 144 Views
Vol. 54, No. 3, September, 2020
EXPERIENCE IN SCALING THE DESIGN OF LOW-EMISSION COMBUSTORS FOR USE IN GAS-TURBINE UNITS OF VARIOUS POWER L. A. Bulysova,1 A. G. Tumanovskii,2 M. N. Gutnik,2 and V. D. Vasil’ev2 Translated from Élektricheskie Stantsii, No. 4, April 2020, pp. 2 – 7.
The possibilities are examined of using already-available developed designs for low-emission combustors (LEC) of a GTU [gas turbine unit] with its own understood control algorithm in other GTUs, such as in their remodeling. The experience of JSC VTI [JSC “All-Russia Thermal Engineering Institute”] was shown in the use of the LEC design developed by them, which passed successful test station trials of full parameters, and was recommended for installation onto a motor of significantly lower power as a prototype for LEC development. The principles and similarity criteria and stages necessary for successful implementation of scaling the LEC are examined. Test results of the developed model of the LEC and a prototype are presented, with incomplete pressure at the JSC VTI test station by the algorithms of the prototype. Good likeness in LEC management and in received results was attained. Keywords: similarity criteria; scaling; low-emission combustor; gas turbine; air-fuel mixture; nitrogen oxides; air bleeding; stable combustion.
burner device and the fire tube can be the first, simple solution. Such a variant cannot be implemented for tie-in to prepared housing if its specific sizes or geometry do not permit this. There arises the necessity of scaling (increase or decrease) the design of the LEC that has been worked out with the sizes and characteristics of another GTU. This route requires a careful and laborious approach to observance of the conditions of similarity (geometrical, hydrodynamic, thermodynamic and so forth) in order to ensure repeatability of processes. In Russian power engineering, ground-based GTUs based on aircraft engines are widely used. The casing of combustors (CC) in them is compact, and the replacement of regular chambers to low-emission ones is associated, as a rule, with implementation with portable ones, making it possible to assign a volume for preparation of the air-fuel mixture and increment the zone for its combustion. In one of these GTUs, developed based on an aircraft engine, the regular combustor is round, and operates by diffusion combustion of a gas fuel with emissions of NOx approximately equal to 150 mg/m3. It is necessary to increase substantially the volume of new low-emission CCs with the required parameters of combustion and with a stability margin. This requires the transformation of the annular chamber, with arrangement of 12 portable countercurrent fire tubes at an angle about 30° to the housing axis. The JSC VTI developed an LEC design with outlet temperature from the combustor 1220°C, which passed success-
Development of low-emission combustors (LEC) of a GTU, associated with the organization of a stable combustion process with a low level of emissions of nitrous oxides NOx and CO carbon mono
Data Loading...
