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首页> 外文会议>ASME(American Society of Mechanical Engineers) Turbo Expo vol.1; 20070514-17; Montreal(CA) >DEVELOPMENT OF ENGINE INTAKE ANTI-ICING SYSTEMS FOR LCAC
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DEVELOPMENT OF ENGINE INTAKE ANTI-ICING SYSTEMS FOR LCAC

机译：LCAC发动机进气防冰系统的开发

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摘要

US Navy ships operating in cold weather require the protection of an engine intake air anti-ice system to prevent blockage of combustion airflow during snow and icing conditions. This requirement does not present any unusual design demands on large displacement type ships because there is more available space, an abundance of usable thermal energy, and lastly their design allows engine weather intakes to be placed in relatively protected locations. However on small craft such as the Navy's Landing Craft Air Cushion (LCAC), intake air anti-icing presents a unique design challenge. This is due to the spray generated by venting of the craft's pressurized air cushion during normal over-water operations that results in significant carry-over of this spray onto the cargo deck, from which it is subsequently ingested into the engine intakes. LCAC is also powered by gas turbines that require large quantities of inlet combustion air for power generation. Because of these considerations the thermal energy required for intake anti-icing on LCAC are significantly higher than for large displacement type ships. Adding to this challenge are the facts that on-board space in an air cushion vehicle is at a premium, and power for thermal energy must be obtained from existing sources whose primary function is other than anti-icing. This paper will trace the development and evolution of LCAC's engine intake anti-ice systems from the craft's initial design, through to the present systems used in the fleet. It will present the tradeoff issues that effected selection of the anti-ice systems, such as energy availability, cold weather criteria, and craft design constraints.
机译：在寒冷天气下运行的美国海军舰船需要保护发动机进气防冰系统，以防止在结冰和结冰时阻塞燃烧气流。对于大排量型船舶，此要求不会带来任何不寻常的设计要求，因为它具有更多的可用空间，大量可用热能，最后，它们的设计允许将发动机进气口放置在相对受保护的位置。但是，在诸如海军登陆艇气垫（LCAC）之类的小型飞机上，进气防结冰带来了独特的设计挑战。这是由于在正常的水上作业过程中，船舶的加压气垫排气所产生的喷雾，导致该喷雾被大量带到货舱甲板上，随后从船上被吸入发动机进气口。 LCAC还由燃气轮机提供动力，而燃气轮机需要大量的进气燃烧空气来发电。由于这些考虑，LCAC进气防冰所需的热能明显高于大排量型船舶。挑战还增加了以下事实：气垫车的车载空间非常宝贵，并且必须从主要功能不是除冰的现有来源获得热能动力。本文将跟踪LCAC发动机进气防冰系统从飞船的最初设计一直到舰队使用的当前系统的发展和演变。它将提出影响防冰系统选择的权衡问题，例如能量可用性，寒冷天气标准和工艺设计约束。

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