Research on Enhancing Burner Performance for YJP-Q Series Vehicle Heaters

MAO Hua-yong1,WANG Da-peng2,WANG Da-hai3,GONG Ting-fang1,ZHU He1,HAO Sheng-bing4(1.School of Energy and Power Engineering,Shandong University,Ji'nan 250061,China;2.The 92323 Unit of CPLA,Qingdao 266071,China;3.Ji'nan Olympic Sports Center,Ji'nan 250102,China;4.Hebei Hongye Machinery Co.,Ltd.,Botou 062150,China)

Vehicle heater;Burner;Combustion tube;Combustion gas backflow shield

Experiments were made with the burner used in YJP-Q series spray-type vehicle heater in order to enhance the performance of burner,including the experiments of different distance from outer tube to heat exchanger edge,cone-shaped shield to baffle,the comparative experiments of different cone-shaped shield diameter,different aperture of the baffle axial auxiliary air inlet,different inlet area of horn-tube air intake duct,and different burner.Results show:the distance from outer tube to heat exchanger edge is better between 15～30 mm;heater has largest thermal power and thermal efficiency,but higher HC emissions when distance from cone-shaped shield to baffle is 100 mm;considering thermal power,102 mm cone-shaped shield diameter is best,next is 89 mm,but 89 mm has better comprehensive performance;thermal efficiency of single-layer burner is 7% lower than double-layer burner because of radiation heat loss.It influences the stability of flame and significantly increases the combustion noise when horn-tube air intake duct and aperture of the baffle axial auxiliary air inlet is too large.