Baz A M
Med Sci Sports Exerc. 1984 Aug;16(4):415-21.
This manuscript deals with the development of theoretical and experimental procedures for investigating the flow phenomena associated with the clearing and breathing phases of the simple J-type snorkel. Special test stands have been built to monitor the effect of changing the snorkel geometrical parameters on its clearing efficiency and breathing resistance characteristics. The experimental results are used to check the validity of the mathematically-developed models that simulate the flow during the clearing and breathing phases. These models are then used as a basis for the development of a rational design procedure that would enable snorkel designers to select the optimum geometrical parameters in a way that guarantees a balance between the breathing and clearing requirements in snorkels. The developed procedures are general in nature and can be readily extended to study snorkels of more complex shapes when operating under various conditions and constraints.
本手稿论述了用于研究与简单J型通气管的清理和呼吸阶段相关的流动现象的理论和实验程序的开发。已搭建了专门的试验台，以监测改变通气管几何参数对其清理效率和呼吸阻力特性的影响。实验结果用于检验在清理和呼吸阶段模拟流动的数学模型的有效性。这些模型随后被用作开发合理设计程序的基础，该程序将使通气管设计者能够以保证通气管呼吸和清理要求之间平衡的方式选择最佳几何参数。所开发的程序本质上具有通用性，并且在各种条件和约束下运行时，可以很容易地扩展到研究更复杂形状的通气管。
