| 摘要 |
FIELD: engines and pumps.SUBSTANCE: gas turbine engine combustion chamber wall includes at least one peripheral row of primary holes, at least one peripheral row of liquefaction holes and microperforation holes. All primary holes are located in one and the same axial position. Primary holes and liquefaction holes are uniformly distributed on the wall periphery. Liquefaction holes are divided at least in two different groups depending on the value of their diameter. Some part of liquefaction holes has maximum diameter, and the other part has minimum diameter. Multiperforation holes have diameters, which are smaller than minimum diameter of liquefaction holes. Liquefaction holes having maximum diameter and liquefaction holes having minimum diameter are equipped with a rear edge in the flow direction. Multiperforation holes are equipped with a front edge in the flow direction. Liquefaction holes having minimum diameter are offset in axial direction to the side of the flow movement in relation to liquefaction holes having maximum diameter. Rear edge of liquefaction holes of small diameter in the flow direction is located in one line in a circumferential direction with a rear edge of liquefaction holes in the flow direction, which have maximum diameter.EFFECT: optimisation of arrangement of liquefaction holes; excluding the possibility of occurrence of random hot points, without increasing the quantity of polluting emissions.5 cl, 6 dwg |
