The effect of a tall tower on natural building ventilation in an urban built environment

Tehnički pronalasci i moderna tehnika obilježili su prethodno stoljeće više nego bilo koje doba u ranijoj ljudskoj povijesti. Visoka razina tehnologije postignuta je nauštrb, danas sve razvidnijih, klimatskih promjena. Zahvaljujući održivom karakteru, prirodna ventilacija, kao metoda koja se i stoljećima prije industrijske revolucije koristila u zgradama, ponovno dobiva na važnosti. Prirodna ventilacija je postupak izmjene zraka u nekom zatvorenom prostoru bez prisilne konvekcije, dakle bez korištenja ventilatora i slične opreme. U sklopu istraživanja provodi se ispitivanje utjecaja visoke zgrade na prirodnu ventilaciju tzv. glavne zgrade, smještene u središtu urbanog okoliša. Detaljno se analizira utjecaj pozicije visoke zgrade u urbanom okolišu, visine visoke zgrade, razmaka između dviju susjednih zgrada u simuliranom okolišu, jednostrane i poprečne ventilacije glavne zgrade i kuta nastrujavanja zraka. Definiraju se metode i oprema potrebni za provedbu eksperimenata iz područja aerodinamike okoliša i konstrukcija. Naposljetku, analizira se utjecaj pojedinih ispitivanih parametara na prirodnu ventilaciju glavne zgrade.Technical innovations and modern technology have marked the last century more than any other time period in human history. A high level of technological development has been achieved at the expense of the adverse climate changes. Therefore, natural ventilation as a method that was used in buildings even centuries before the industrial revolution is regaining its importance due to its sustainable character. Natural ventilation is the process of exchanging air in an enclosed space without the use of forced convection, i.e. without the use of fans and other similar devices. The focus of the research was to show the effect that a tower building located in the close neighbourhood has on the ventilation of the studied building, located in the center of an urban environment. The effect of the tower position in the urban environment, the height of the tower, the spacing between two neighbouring buildings in the simulated environment, single-sided and cross-ventilation strategy of the main building and flow incidence angles were analyzed in detail. The methods and equipment needed for the experiments in environmental and structural aerodynamics are defined. Finally, the influence of the studied parameters on the natural ventilation of the main building is analyzed