Ana Cláudia Medeiros Souza

YIELD AND FORAGE QUALITY OF SALTBUSH IRRIGATED WITH REJECT BRINE FROM DESALINATION PLANT BY REVERSE OSMOSIS

Rural communities located in the Brazilian Northeast, especially in the semiarid zone, live with water shortages resulting from erratic rainfall. This work proposes the cultivation of saltbush (Atriplex nummularia) in the Rural Settlement Project of Boa Fé, Mossoró/RN as alternative to the disposal of reject brine from desalination plant on yield of forage. The statistical design was a split-plot design, being four treatments at the plots, related to irrigation with reject brine water, at different levels of soil moisture by moisture from Field Capacity (FC) (100, 85, 70 and 50% of FC) and in subplots and two levels of organic manure (without fertilized and fertilized) with four replications. The variables of yield and forage quality of saltbush were analyzed. It was observed that saltbush has a great production capacity in terms of fresh matter and drought for saltbush under a level of 85% soil moisture in relation to the field capacity of soil, presenting minimal loss of yield; however, this proved to be productive even with the dry soil. The total yield was satisfactory, showing its viability for forage production.

Parametric Analysis of Different Nacelle Positions in the DLR-F6 Model by Means of the CFD++ Code

The integration of engines into the aircraft involves many important aspects. These aspects can be investigated by means of wind tunnel experiments or numerical simulations. The main goal of this study is to analyze the effects of different nacelle positions on the aerodynamic coefficients and pressure distributions through numerical simulations. The aircraft geometry investigated is the DLR-F6 configuration. The nacelle is changed from the original configuration to four different positions, which are characterized by distances in the longitudinal and vertical directions. High-quality hexahedral grids are used in the CFD calculations. In order to evaluate the effects of the nacelle shift, all simulations are carried out in the same conditions and the drag, lift and pressure coefficients are evaluated numerically. Interesting results are obtained. The lift coefficient is shown to be more sensitive to variations of nacelle position than the drag coefficient. Based on the simulation results, it can be inferred that the optimum position for the nacelle, among those investigated, is the most forward one.