ugg milano Optimal Design _1858 assistant nozzle

Optimization of auxiliary nozzle

Large. But the aperture is not too small, too small orifice due to oil pollution caused by sub-block fabric, the radius of the proposed use of a round nozzle nozzle 13.5 - 1ram. 1.4 auxiliary nozzle jet and the border of the treatment chamber air flow in the channel resistance can be divided into two categories: loss and partial loss along the way, where losses are small along the way, the local energy per unit weight of fluid loss with calculated by: Khouang 2h, = (3) 05} is one of the local resistance coefficient. . \d, E0. local energy loss is zero. Therefore, the nozzle chamber vents and the border, should be r> 0.14d arc chamfered best advantage of this approach on the other hand: d mouth ldAi-M -2--1 Article (4) in subsonic case, M 0, using circular chamfer can accelerate the flow, and accelerated after the other with cylindrical section to stabilize the flow cross-section. Therefore, the auxiliary nozzle is d best form. 1.5 The distribution of the porous auxiliary nozzle hole distribution of the hole to even more is better, Cambodia uniform set of auxiliary nozzle is better. and synthesis After the energy loss, high utilization. 27 iv 1.6 nozzle holes of porous secondary pipeline chip for the proposed auxiliary nozzle holes with odd as well. For example, in Figure 6. ��, 2,3,4 a uniform pore distribution, pore 5,[link widoczny dla zalogowanych], air can be constrained to prevent the weft from the weft yarn off the tank at the escape. such assistance not only good for cluster nozzle. there to prevent the weft yarn from the slot off at the escape ability. auxiliary reeds for wind tunnel nozzle recommended number of holes with an even number as well. and dagger work two holes as well. reed auxiliary nozzle duct. partly because many holes, large energy loss, design and processing difficulties, on the other hand, due to small duct reed slot . weft itself has some capacity constraints, the need is to assist the nozzle Relay weft. Figure 6 Distribution map of porous auxiliary nozzle hole t.7 porous auxiliary nozzle distance between the two holes for the reed duct auxiliary nozzle hole distance between the two smaller is better. two-hole synthetic jet stream, the energy loss smaller. too much distance between the two holes,[link widoczny dla zalogowanych], the proliferation of large, synthetic focus and far, is not conducive to the weft insertion. If the distance between two holes is too small. is difficult to processing. For the pipe-piece auxiliary nozzle distance between two holes the same diameter as small as possible. 1.8 porous porous secondary auxiliary nozzle spray chamber hiding out of the hole shape of flow velocity distribution and the pore distribution bullied room influence. In order to obtain a uniform velocity distribution has the following methods. outflow holes in the area of equal conditions,[link widoczny dla zalogowanych], the chamber cross-sectional area gradually reduced (Figure 7). in the design flow rate q, the flow velocity y.'s condition, Consider a variable cross-section auxiliary nozzle chamber (Figure 7), located away from the gas chamber at the end,, 117, take an infinitesimal length of the d, during which over a hole in the d from both ends. indoor air velocity and v,[link widoczny dla zalogowanych], respectively y + d, respectively, P static pressure and P + dP, according to the total current value of the equation are: Figure 7 tapered porous auxiliary nozzle chamber + r +; r where r is the gas and severe, as the local resistance coefficient, the specific data are available literature Fs]. finished was a r, in order to obtain a uniform velocity distribution, requiring static gas chamber should be equal, which requires dP 10 points (6) can be obtained: one in which the first hole before the chamber cross cross-sectional area. So after the first hole area of change is: a niche of one (1 a {a 28 a (5) r6) (7) ( Cool

(9) l _ Division obtained after the second injection port, the first = first n-1 by the hole area after a report of Sad

1 {(10) One (1 {a curse. ...) and other one (�� A n - 1) a {(12) Thus, in order to have a porous secondary nozzles Cambodia of a better set, better symmetry synthesis gas (air velocity and flow of the holes are equal) can be designed to flow out of the hole velocity distribution. by the type area of the chamber gradually becomes smaller to 2 conclusions (1) and the weft insertion process from fluid dynamics,[link widoczny dla zalogowanych], the optimal design is given a secondary nozzle 8 proposals. (2) gives the auxiliary nozzle so that the holes of porous flow velocity and flow out of the methods are equal. References and other textile Zhang Geng Textile Industry Hj version airflow problems�� 889P Du Mao Sh�� state license is not on the high q workers of the ear. workers I-, Si technology trends Meng-dimensional engineering 1982y.i35No.2nl I ��cents a jet loom weft air flow and to overcome untwisting of weft weaving impede China University Doctoral Dissertation 1991P crisp spear viscous flow of fluid dynamics theory and engineering calculation Chapter Press 1986P �� Beijing Aviation Institute of Hydraulic and Electric Engineering Fluid Mechanics Press 1984P2'9 -

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