燃气涡轮试验与研究
燃氣渦輪試驗與研究
연기와륜시험여연구
Gas Turbine Experiment and Research
2015年
3期
43-48
,共6页
航空风冷活塞发动机%缸体%翅片%传热%低雷诺数%数值模拟
航空風冷活塞髮動機%缸體%翅片%傳熱%低雷諾數%數值模擬
항공풍랭활새발동궤%항체%시편%전열%저뢰낙수%수치모의
aerial air-cooled piston engine%cylinder%fin%heat transfer%low Reynolds number%numerical simulation
以航空风冷发动机为研究对象，采取数值模拟的方法，对地面状态发动机缸体的热状态及流场进行模拟计算。模拟结果与试验结果对比证实，采用此种模拟计算方法能准确反映发动机的真实换热过程与换热水平。采用验证后的计算模型，对发动机高空飞行冷却状况进行分析，研究了低雷诺数条件下发动机翅片散热能力的变化，提出采用错位翅片来提高低雷诺数条件下翅片的换热能力。模拟分析表明，此种翅片形式具有一定的工程应用价值。
以航空風冷髮動機為研究對象，採取數值模擬的方法，對地麵狀態髮動機缸體的熱狀態及流場進行模擬計算。模擬結果與試驗結果對比證實，採用此種模擬計算方法能準確反映髮動機的真實換熱過程與換熱水平。採用驗證後的計算模型，對髮動機高空飛行冷卻狀況進行分析，研究瞭低雷諾數條件下髮動機翅片散熱能力的變化，提齣採用錯位翅片來提高低雷諾數條件下翅片的換熱能力。模擬分析錶明，此種翅片形式具有一定的工程應用價值。
이항공풍랭발동궤위연구대상，채취수치모의적방법，대지면상태발동궤항체적열상태급류장진행모의계산。모의결과여시험결과대비증실，채용차충모의계산방법능준학반영발동궤적진실환열과정여환열수평。채용험증후적계산모형，대발동궤고공비행냉각상황진행분석，연구료저뢰낙수조건하발동궤시편산열능력적변화，제출채용착위시편래제고저뢰낙수조건하시편적환열능력。모의분석표명，차충시편형식구유일정적공정응용개치。
Based on one aerial air-cooled engine, the heat and flowfield of the cylinder have been simulat?ed at sea-level condition. Comparison with the experiment results shows that the simulation result is reli?able about the heat transfer of cylinder. The demonstrated computation model was used to analyze the cool?ing of aero-engine during altitude flight. Based on the fin heat capacity changes according to the low Reyn?olds number conditions, the offset fins were used to improve the performance of the heat exchanger under low Reynolds number conditions, and the improvement has been confirmed by the simulation analysis, which gives a possible engineering solution.
