Correction of Dynamic Characteristics of SAR Cryogenic GTE on Consumption of Gasified Fuel

[摘要] When the gas turbine engines (GTE) NK-88 were developed for liquid hydrogen and NK-89 for liquefied natural gas, performance of the systems with a turbo-pump unitary was improved and its proved without direct regulation of the flow of a cryogenic fuel, which was supplied by a centrifugal pump of the turbo-pump unit (TPU) Command from the "kerosene" system. Such type of the automatic control system (SAR) has the property of partial "neutralization" of the delay caused by gasification of the fuel. This does not require any measurements in the cryogenic medium, and the failure of the centrifugal cryogenic pump does not lead to engine failure. On the other hand, the system without direct regulation of the flow of cryogenic fuel has complex internal dynamic connections, their properties are determined by the characteristics of the incoming units and assemblies, and it is difficult to maintain accurate the maximum boundary level and minimum fuel consumption due to the influence of a booster pressure change. Direct regulation of the consumption of cryogenic fuel (prior to its gasification) is the preferred solution, since for using traditional liquid and gaseous fuels this is the main and proven method. The scheme of correction of dynamic characteristics of a single-loop SAR GTE for the consumption of a liquefied cryogenic fuel with a flow rate correction in its gasified state, which ensures the dynamic properties of the system is not worse than for NK-88 and NK-89 engines.

[发布机构] PJSC Kuznetsov, Samara, Russia^1;Institute of Engine and Power Plant Engineering, Samara National Research University, Moskovskoye Shosse 34, 443086, Russia^2

[效力级别] 无线电电子学 [学科分类] 航空航天科学

[关键词] Cryogenic pumps;Dynamic characteristics;Dynamic property;Internal dynamics;Liquid hydrogens;Minimum fuel consumption;Preferred solutions;Pressure change