国外文献 > 1.轴承 > 4. 设计与分析 > 设计方法
关键词搜索：
| 标 题： |
A holistic methodology to correct heat transfer and bearing friction losses from hot turbocharger maps in order to obtain adiabatic efficiency of the turbomachinery
一种整体方法，用于校正高温涡轮增压器图谱中的传热和轴承摩擦损失，以获得涡轮机械的绝热效率 |
| 作 者： |
Serrano, Jose R.
Olmeda, Pablo
Arnau, Francisco J.
Samala, Vishnu |
| 关键词： |
Turbocharging [涡轮增压]
waste-gate [ 废物门]
discharge coefficient [ 泄流系数]
experimental [ 实验性的]
modeling [ 建模] |
| 出版年： |
2020 |
| 期刊名： |
International journal of engine research
国际发动机研究杂志 |
| 年卷期： |
2020, vol.21, no.8 |
| 摘 要： |
Turbocharger performance maps provided by manufacturers are usually far from the assumption of reproducing the isentropic performance. The reason being, those maps are usually measured using a hot gas stand. The definition of the effective turbocharger efficiency maps include the mechanical losses and heat transfer that has occurred during the gas stand test for the turbine maps and only the heat transfer for the compressor maps. Thus, a turbocharger engine model that uses these maps provides accurate results only when simulating turbocharger operative conditions similar to those at which the maps are recorded. However, for some critical situations such as Worldwide harmonized Light vehicles Test Cycles (WLTC) driving cycle or off-design conditions, it is difficult to ensure this assumption. In this article, an internal and external heat transfer model combined with mechanical losses model, both previously developed and calibrated, has been used as an original tool to ascertain a calculation procedure to obtain adiabatic maps from diabatic standard turbocharger maps. The turbocharger working operative conditions at the time of map measurements and geometrical information of the turbocharger are necessary to discount both effects precisely. However, the maps from turbocharger manufacturers do not include all required information. These create additional challenges to develop the procedure to obtain approximated adiabatic maps making some assumptions based on SAE standards for non-available data. A sensitivity study has been included in this article to check the validity of the hypothesis proposed by changing the values of parameters which are not included in the map data. The proposed procedure becomes a valuable tool either for Original Equipment Manufacturers (OEMs) to parameterize turbocharger performance accurately for benchmarking and turbocharged engine design or to turbocharger manufacturers to provide much-appreciated information of their performance maps.
制造商提供的涡轮增压器性能曲线通常与再现等熵性能的假设相差甚远。原因在于，这些曲线通常是通过热气试验台测量得出的。有效涡轮增压器效率曲线的定义包括：对于涡轮机曲线，包含在气动试验过程中产生的机械损耗和传热； 而对于压缩机曲线，则仅包含传热。因此，只有当涡轮增压发动机模型模拟的运行工况与曲线记录时的工况相似时，才能获得准确的结果。然而，在某些关键工况下，例如全球统一轻型车辆测试循环（WLTC）或非设计工况，很难保证这一假设成立。本文提出了一种原创方法，结合了先前开发并校准的内外传热模型与机械损耗模型，以确定从非绝热标准涡轮增压器曲线获取绝热性能曲线的计算流程。在测量涡轮增压器工作工况和几何信息时，必须准确考虑两种影响因素。然而，涡轮增压器制造商提供的数据图谱并未包含所有必需的信息，这给开发用于获取近似绝热图谱的流程带来了额外挑战，尤其在缺乏可用数据的情况下，需基于SAE标准做出一些假设。本文中已包含一项敏感性分析，通过改变图谱数据中未包含的参数值来验证所提出假设的有效性。该方法为原始设备制造商（OEM）提供了宝贵的工具，可精确表征涡轮增压器性能，用于发动机性能基准测试和涡轮增压发动机设计； 同时，也为涡轮增压器制造商提供了其性能图谱的重要参考信息。 |
| 中文内容为网络AI翻译，专业术语未必准确，仅供参考。 |
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